Chapter Scalar & Vector
Q: A vector has both magnitude and?
a) Weight
b) Direction
c) Speed
d) Density
Answer: b) Direction
Q: A scalar quantity has?
a) Only magnitude
b) Only direction
c) Both magnitude and direction
d) Neither magnitude nor direction
Answer: a) Only magnitude
Q:Which of the following is a scalar
quantity?
a) Force
b) Displacement
c) Speed
d) Acceleration
Answer: c) Speed
Q: Work is a scalar quantity because?
a) It has only magnitude
b) It has only direction
c) It has both magnitude and direction
d) It has neither magnitude nor direction
Answer: a) It has only magnitude
Q: Which of the following is a vector
quantity?
a) Distance
b) Speed
c) Displacement
d) Time
Answer: c) Displacement
Q: The magnitude of a vector is always?
a) An integer
b) A real number
c) A positive quantity
d) A negative quantity
Answer: c) A positive quantity
Q: A vector lying along x-axis has?
a) its x and z component zero
b) its x and y component equal to zero
c) its y-component equal to zero
d) None of these
Answer: c) its y-component equal to zero
Q: If two vectors have the same
magnitude and opposite directions, their resultant is?
a) Zero
b) Double the magnitude
c) The sum of the magnitudes
d) Undefined
Answer: a) Zero
Q: Which type of vector is
represented by an arrow in space and has only direction, not magnitude?
a) Unit vector
b) Position vector
c) Null vector
d) Polar vector
Answer: c) Null vector
a) Maximum
b) Minimum
c) Zero
d) Undefined
Answer: c) Zero
Q: In physics, a vector representing
the position of a point in a coordinate system is called?
a) Null vector
b) Position vector
c) Displacement vector
d) Polar vector
Answer: b) Position vector
Q : Which of the following is a
scalar product of vectors A and B?
a) A × B
b) A ∙ B
c) A - B
d) A / B
Answer: b) A ∙ B
a) Fixed vector
b) Scalar vector
c) Polar vector
d) Variable vector
Answer: d) Variable vector
Q: The unit vector in the direction
of the positive x-axis is?
a) i
b) j
c) k
d) -i
Answer: a) i
Q: The addition of two or more
vectors is known as?
a) Null vector
b) Resultant vector
c) Position vector
d) Negative vector
Answer: b) Resultant vector
a) Left-hand rule
b) Head-to-tail rule
c) Right-hand rule
d) None of the above
Answer: b) Head-to-tail rule
Q: A negative vector has?
a) The same magnitude and direction as the original vector
b) The same magnitude and the opposite direction as the original vector
c) A magnitude of 0
d) Undefined magnitude and direction
Answer: b) The same magnitude and the opposite direction as the original vector
Q: Expression for the magnitude of
the vector product of two vectors A and B.?
a) AB cos⊖
b) AB
c) AB sin⊖
d) A/B tan⊖
Answer: c) AB sin⊖
a) A sin⊖
b) A cos⊖
c) A tan⊖
d) None of the above
Answer: b) A cos⊖
Q: If vector A = 2i + 3j and vector B
= 4i - 2j, what is the magnitude of the sum of these vectors?
a) 5
b) 6
c) 7
d) 8
Answer: c) 7
Q: What is the term for the division
of a vector into its vertical components?
a) Vector Decomposition
b) Vector Resolution
c) Vector Magnification
d) Vector Contraction
Answer: b) Vector Resolution
a) Vector Composition
b) Vector Decomposition
c) Vector Resolution
d) Vector Convergence
Answer: a) Vector Composition
Q: If vector A = ^3i^+4j^ and vector
B = ^2i^−2j^, what is the dot product A ⋅ B ?
a) 2
b) 4
c) 10
d) 12
Answer: b) 4
Q: If vector A = ^i^+j^+k^ and
vector B = ^i^−j^−k^, what is the cross product A × B?
a) −2i^+2j^−2k^
b) 2i^−2j^+2k^
c)−3i^+3j^−3k^
d) 3i^−3j^+3k^
Answer: c)−3i^+3j^−3k^
NTS BSN Entry Test Preparation
Chapter Motion
Q:Motion is defined as a change in?
A) Mass
B) Position
C) Temperature
D) Volume
Answer: B) Position
Q: An object is considered at rest when its position?
A) Changes continuously
B) Changes at a constant rate
C) Does not change with time
D) Changes in a zigzag pattern
Answer: C) Does not change with time
Q: Oscillatory motion is characterized by?
A) Continuous circular movement
B) To and fro motion about a fixed point
C) Linear motion at a constant speed
D) Random motion in all directions
Answer: B) To and fro motion about a fixed point
Q: Displacement is best defined as?
A) The total path traveled by an object
B) The change in position of an object
C) The total time taken for a journey
D) The speed of an object
Answer: B) The change in position of an object
Q: The tendency of an object to resist changes in its state of motion is known as?
A) Acceleration
B) Inertia
C) Velocity
D) Force
Answer: B) Inertia
Q: Motion along a straight line is called?
A) Circular motion
B) Linear motion
C) Oscillatory motion
D) Projectile motion
Answer: B) Linear motion
Q: Newton's first law of motion is also known as the law of?
A) Acceleration
B) Inertia
C) Action and reaction
D) Gravitation
Answer: B) Inertia
Q: Newton's second law of motion is expressed mathematically as?
A) F=m
B) a=mF
C) F=ma
D) m=aF
Answer:C) F=ma
Q: Newton's third law of motion states that for every action, there is an equal and opposite?
A) Force
B) Acceleration
C) Reaction
D) Mass
Answer: C) Reaction
Q: The momentum of an object is defined as the product of its ?
A) Mass and acceleration
B) Mass and velocity
C) Force and time
D) Distance and time
Answer: B) Mass and velocity
Q: The SI unit of momentum is?
A) Newton
B) Kilogram-meter per second
C) Joule
D) Watt
Answer: B) Kilogram-meter per second
Q : According to the law of conservation of momentum, the total momentum of a system of objects remains constant if?
A) No external forces act on the system
B) There is no friction
C) All objects have the same mass
D) The system is at rest
Answer: A) No external forces act on the system
Q: In a collision between two objects, if no external forces are present, the total momentum?
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
Answer: C) Remains constant
Q: In an elastic collision between two objects, both kinetic energy and momentum are?
A) Conserved
B) Only momentum is conserved
C) Only kinetic energy is conserved
D) Neither momentum nor kinetic energy is conserved
Answer: A) Conserved
Q: What is the quantity that represents the rate of change of position of an object?
A) Speed
B) Velocity
C) Distance
D) Displacement
Answer: B) Velocity
Q: Which force opposes the relative motion or tendency of such motion between two surfaces in contact?
A) Tension
B) Normal force
C) Friction
D) Gravitational force
Answer: C) Friction
Q: An object moving with uniform velocity means that?
A) Its speed is constant
B) Its direction is constant
C) Both speed and direction are constant
D) Neither speed nor direction is constant
Answer: C) Both speed and direction are constant
Q: An object is moving with variable velocity. What can be inferred about its motion?
A) Its speed is changing
B) Its direction is changing
C) Both speed and direction are changing
D) Its speed and direction are constant
Answer: C) Both speed and direction are changing
Q: Acceleration is defined as the rate of change of?
A) Distance
B) Displacement
C) Velocity
D) Time
Answer: C) Velocity
Q: In uniform acceleration, the velocity of an object changes?
A) At a constant rate
B) At an increasing rate
C) At a decreasing rate
D) Randomly
Answer: A) At a constant rate
Q: When an object experiences variable acceleration, the velocity-time graph is?
A) A straight line
B) A curve
C) A series of straight lines
D) A circle
Answer: B) A curve
Q: In a system where the net external force is zero, the total linear momentum is?
A) Always Increasing
B) Always decreasing
C) Constant
D) Zero
Answer: C) Constant
Q: Projectile motion occurs when an object is?
A) Stationary
B) Moving with constant speed
C) Launched into the air and subject only to the force of gravity
D) Accelerating downward
Answer: C) Launched into the air and subject only to the force of gravity
Q: The time of flight for a projectile depends on ?
A) The initial velocity
B) The angle of projection
C) Both the initial velocity and the angle of projection
D) The mass of the projectile
Answer: C) Both the initial velocity and the angle of projection
Q: The range of a projectile is the?
A) Maximum height reached
B) Total horizontal distance traveled
C) Time of flight
D) Initial velocity
Answer: B) Total horizontal distance traveled
Chapter Wave Motion & Sound
Q: What do waves transmit from one
place to another?
A. Matter
B. Information
C. Energy
D. Light
Answer: C. Energy
Q: What is the reason why sound waves
cannot travel in a vacuum?
A. Vacuum lacks required temperature
B. Sound waves are incompatible with a vacuum
C. No medium for vibrations in a vacuum
D. Vacuum absorbs sound energy
Answer: C. No medium for vibrations in a vacuum
Q: Which type of waves relies on a
material medium for their transmission?
A. Electromagnetic waves
B. Mechanical waves
C. Transverse waves
D. Longitudinal waves
Answer: B. Mechanical waves
Q: When a stationary wave is formed,
what happens to its frequency?
A. Same as that of the individual waves
B. Twice as that of the individual waves
C. Half as that of the individual waves
D. Thrice as that of the individual waves
Answer: A. Same as that of the individual waves
Q: How can transverse waves be
distinguished from longitudinal waves based on which property?
A. Refraction
B. Polarization
C. Interference
D. Diffraction
Answer: B. Polarization
Q: What is the velocity of sound in a
vacuum?
A. 32 m/s
B. 420 m/s
C. Zero
D. 234 m/s
Answer: C. Zero
Q: According to Newton, sound travels in air under the conditions of?
A. Adiabatic
B. Isothermal
C. Isobaric
D. Isochoric
Answer: B. Isothermal
Q: Laplace found that the alternate
compressions and rarefactions produced in sound waves follow which process?
A. Isothermal
B. Adiabatic
C. Isobaric
D. Isochoric
Answer: B. Adiabatic
Q: To which types of waves does the
Doppler effect apply?
A. Only sound waves
B. Only light waves
C. Both sound and light waves
D. Neither sound nor light waves
Answer: C. Both sound and light waves
A. Amplitude
B. Frequency
C. Wavelength
D. Period
Answer: C. Wavelength
Q: What is the unit of frequency?
A. Hertz (Hz)
B. Newtons (N)
C. Joules (J)
D. Amperes (A)
Answer: A. Hertz (Hz)
Q : In SHM, the restoring force is
proportional to?
A. Displacement
B. Velocity
C. Acceleration
D. Time
Answer: A. Displacement
A. Wavelength
B. Frequency
C. Amplitude
D. Velocity
Answer: C. Amplitude
Q: What is the range of frequencies
that the average human ear can hear?
A. 20 Hz to 20,000 Hz
B. 1 Hz to 1,000 Hz
C. 50 Hz to 5,000 Hz
D. 10 Hz to 10,000 Hz
Answer: A. 20 Hz to 20,000 Hz
Q: In a transverse wave, the
particles of the medium move?
A. Parallel to the direction of the wave
B. Perpendicular to the direction of the wave
C. In a circular motion
D. Along a random path
Answer: B. Perpendicular to the direction of the wave
A. Radio wave
B. Light wave
C. Sound wave
D. Water wave
Answer: C. Sound wave
Q: In a transverse wave, the highest
point of the wave is called the?
A. Trough
B. Crest
C. Node
D. Antinode
Answer: B. Crest
Q: Ultrasonic waves have ?
A. have a frequency in the audible range
B. have a frequency greater than 20 kHz
C. have a frequency lower than 20 Hz
D. All of above
Answer: B. have a frequency greater than 20 kHz
A. Decreases.
B. Increases.
C. Remains Constant
D. Becomes zero.
Answer: C. Remains Constant
Q: In simple harmonic motion (SHM),
when is the kinetic energy of an object at its maximum?
A. At the starting point of the motion.
B. At the furthest point from the equilibrium position.
C. At the mean or equilibrium position
D. At the point where potential energy is maximum.
Answer: C. At the mean or equilibrium position
Q: What is the unit of sound
intensity?
A. Watt
B. Joule
C. Hertz
D. Decibel
Answer: D. Decibel
Q: When two identical traveling waves are superimposed, what happens to the velocity of the resultant wave?
A. Decreases
B. Increases
C. Remains unchanged
D. Becomes zero
Answer: C. Remains unchanged
Q: When force and displacement are in
perpendicular directions, what is the work done?
A. Zero
B. Maximum
C. Minimum
D. Variable
Answer: A. Zero
Q: The area under the
force-displacement graph represents?
A. Work Done
B. Power
C. Energy
D. Momentum
Answer: A. Work Done
Q: What happens to the kinetic energy of an object when its velocity is doubled?
A. It is halved
B. It remains the same
C. It is quadrupled
D. It double
Answer: C. It is quadrupled
Q: A machine does 500 J of work in 10
seconds. What is its power?
A. 50 W
B. 5 W
C. 100 W
D. 5000 W
Answer: A. 50 W
Q: What is the kinetic energy of a
700 kg car moving with a velocity of 20 m/s?
A. 140,000 J
B. 140,000 N
C. 70,000 J
D. 70,000 N
Answer: A. 140,000 J
Q: If the velocity of an object is zero, what can be said about its kinetic energy?
A. It is maximum
B. It is minimum
C. It is zero
D. It is constant.
Answer: C. It is zero
Q: What is the dimension of power?
A. [ML2T-3]
B. [ML2T-2]
C. [ML2T3]
D. none of these
Answer: A. [ML2T-3]
Q: An object with a mass of 4 kg is
lifted to a height of 5 meters. What is its gravitational potential energy?
A. 200 J
B. 100 J
C. 20 J
D. 196 J
Answer: D. 196 J
A. Work done
B. Power
C. Energy
D. Momentum
Answer: B. Power
Q: The work done by the force of
friction is?
A. Positive
B. Negative
C. Zero
D. Variable
Answer: B. Negative
Q: Which of the following is an
example of non-conservative force ?
A. Gravity
B. Elastic force
C. Friction
D. Tension
Answer: C. Friction
Q : Which of the following is a form
of potential energy?
A. Kinetic Energy
B. Thermal Energy
C. Gravitational Potential Energy
D. Radiant Energy
Answer: C. Gravitational Potential Energy
Q: A rock with a mass of 5 kg is
lifted to a height of 12 meters. What is its gravitational potential energy?
A. 600 J
B. 60 J
C. 120 J
D. 588 J
Answer: D. 588 J
Q: What is the SI unit of work?
A. Joule (J)
B. Newton (N)
C. Watt (W)
D. Kilogram (kg)
Answer: A. Joule (J)
A. 38.2 J
B. 392.1 J
C. 39.2 J
D. 3.92
Answer: C. 39.2 J
Q: A ball of mass 0.2 kg is thrown
vertically upwards by applying a force by hand. If the hand moves 0.2 m while
applying the force and the ball goes up to 2 in height further, find the
magnitude of the force. Consider g = 10m/s 2)?
A. 5 N
B. 10 N
C. 15 N
D. 22 N
Answer: D. 22 N
Q: The Propulsion force of a rocket
is?
A. Conservative force
B. Non-conservative force
C. Both (A) and (B)
D. None of these
Answer: B. Non-conservative force
A. Kinetic energy to potential energy
B. Potential energy to kinetic energy
C. Mechanical energy to thermal energy
D. Electrical energy to gravitational energy
Answer: B. Potential energy to kinetic energy
Q: Power is defined as?
A. The rate of doing work
B. The force applied to an object
C. The energy stored in an object
D. The distance traveled by an object
Answer: A. The rate of doing work
Q: In which type of field is the work
done in moving a body along a closed path always zero?
A. Conservative field
B. Non-conservative field
C. Uniform field
D. Non-uniform field
Answer: A. Conservative field
A. Gravitational potential energy
B. Elastic potential energy
C. Kinetic energy
D. Thermal energy
Answer: B. Elastic potential energy
Q: The kinetic energy of an object
depends on?
A. It's mass only
B. Its velocity only
C. Both mass and velocity
D. Neither mass nor velocity
Answer: C. Both mass and velocity
Q: If an object is lifted to a
greater height, what happens to its gravitational potential energy?
A. It increases
B. It decreases
C. It remains constant
D. It becomes zero
Answer: A. It increases
Chapter Heat & Thermodynamics
Q: The average translational kinetic
energy of gas molecules in the same container, with different masses, is
proportional to ?
A. Pressure
B. Volume
C. Density
D. Absolute Temperature
Answer: D. Absolute Temperature
Q: What does the coefficient of
linear expansion measure for a material?
A. Change in mass per unit length
B. Change in volume per degree Celsius
C. Change in length per unit length per degree change in temperature
D. Change in density per unit volume
Answer: C. Change in length per unit length per degree change in temperature
Q: What is the numerical value of
Boltzmann's constant (k)?
A. 1.38×10−31J K−1
B. 3.18×10−31J K−1
C. 3.18×10−23J K−1
D. 1.38×10−23J K−1
Answer: D. 1.38×10−23J K−1
Q: Device that converts heat into
mechanical energy called?
A. Thermostat
B. Heat Pump
C. Heat Engine
D. Perpetual machine
Answer: C. Heat Engine
Q: Which process involves the
conversion of all the heat supplied into work done?
A. Adiabatic process
B. Isentropic process
C. Isothermal process
D. Irreversible process
Answer: C. Isothermal process
Q: The triple point of water is?
A. 0°C
B. 100°C
C. 273.16 K
D. -273.15°C
Answer: C. 273.16 K
A. 37°C
B. 42°C
C. 55°C
D. 41°C
Answer: A. 37°C
Q: If the volume of a gas is held
constant and its temperature is increased, what will happen to the pressure?
A. The pressure will increase
B. The pressure will decrease
C. The density will decrease
D. The pressure will remain constant
Answer: A. The pressure will increase
Q: What does Boyle's Law hold for an
ideal gas during?
A. Isochoric changes
B. Isothermal changes
C. Isobaric changes
D. Adiabatic changes
Answer: B. Isothermal changes
A. Mass
B. Volume
C. Density
D. Kinetic energy
Answer: D. Kinetic energy
Q: What is the work done in an
isochoric process?
A. Positive
B. Negative
C. Zero
D. Variable
Answer: C. Zero
Q: What is the dimension of pressure?
A. ML−1T−2
B. ML−1T−1
C. ML−2T−2
D. ML−2T−1
Answer: A. ML−1T−2
A. 0 degrees Celsius and 1 atm pressure
B. 25 degrees Celsius and 1 bar pressure
C. 100 degrees Celsius and 1 atm pressure
D. 273.15 K and 1 Pascal pressure
Answer: A. 0 degrees Celsius and 1 atm pressure
Q: The system in which neither the
transformation of matter nor the exchange of energy with the surroundings
occurs is called ?
A. Closed system
B. Isolated system
C. Open system
D. Adiabatic system
Answer: B. Isolated system
Q: How can heat be produced?
A. Frictional processes
B. Chemical processes
C. Electrical processes
D. All of the above
Answer: D. All of the above
A. Temperature
B. Disorder or randomness
C. Pressure
D. Volume
Answer: B. Disorder or randomness
Q: What is the mathematical
representation of the first law of thermodynamics?
A. ΔU=Q−W
B. Q=ΔU−W
C. W=ΔU−Q
D. Q+W=ΔU
Answer: A. ΔU=Q−W
Q: If the temperature of dry ice is
-157 degrees Fahrenheit, what is the equivalent temperature in Celsius?
A. -98°C
B. -105°C
C. -142°C
D. -168°C
Answer: B. -105°C
A. J/L
B. N.m/sec
C. Kgm²/sec².K
D. JK⁻¹
Answer: D. JK⁻¹
Q: If the pressure of a gas is
doubled according to Boyle's Law, what happens to its volume?
A. It becomes double
B. It becomes one-fourth
C. It becomes half
D. It becomes four times
Answer: C. It becomes half
Q: What is the term for the amount of
heat needed to raise the temperature of 1 mole of a substance by 1 Kelvin?
A. Heat capacity
B. Molar heat capacity
C. Heat fusion
D. None
Answer: B. Molar heat capacity
Chapter Work, Power and Energy
Q: When force and displacement are in
perpendicular directions, what is the work done?
A. Zero
B. Maximum
C. Minimum
D. Variable
Answer: A. Zero
Q: The area under the
force-displacement graph represents?
A. Work Done
B. Power
C. Energy
D. Momentum
Answer: A. Work Done
Q: What happens to the kinetic energy
of an object when its velocity is doubled?
A. It is halved
B. It remains the same
C. It is quadrupled
D. It double
Answer: C. It is quadrupled
Q: A machine does 500 J of work in 10
seconds. What is its power?
A. 50 W
B. 5 W
C. 100 W
D. 5000 W
Answer: A. 50 W
Q: What is the kinetic energy of a
700 kg car moving with a velocity of 20 m/s?
A. 140,000 J
B. 140,000 N
C. 70,000 J
D. 70,000 N
Answer: A. 140,000 J
Q: If the velocity of an object is
zero, what can be said about its kinetic energy?
A. It is maximum
B. It is minimum
C. It is zero
D. It is constant.
Answer: C. It is zero
A. [ML2T-3]
B. [ML2T-2]
C. [ML2T3]
D. none of these
Answer: A. [ML2T-3]
Q: An object with a mass of 4 kg is
lifted to a height of 5 meters. What is its gravitational potential energy?
A. 200 J
B. 100 J
C. 20 J
D. 196 J
Answer: D. 196 J
Q: The dot product of force and
velocity is known as?
A. Work done
B. Power
C. Energy
D. Momentum
Answer: B. Power
A. Positive
B. Negative
C. Zero
D. Variable
Answer: B. Negative
Q: Which of the following is an
example of non-conservative force ?
A. Gravity
B. Elastic force
C. Friction
D. Tension
Answer: C. Friction
Q : Which of the following is a form
of potential energy?
A. Kinetic Energy
B. Thermal Energy
C. Gravitational Potential Energy
D. Radiant Energy
Answer: C. Gravitational Potential Energy
Q: A rock with a mass of 5 kg is lifted to a height of 12 meters. What is its gravitational potential energy?
A. 600 J
B. 60 J
C. 120 J
D. 588 J
Answer: D. 588 J
Q: What is the SI unit of work?
A. Joule (J)
B. Newton (N)
C. Watt (W)
D. Kilogram (kg)
Answer: A. Joule (J)
Q: If a body with a mass of 2 kg is
raised vertically through 2m, then the work done will be?
A. 38.2 J
B. 392.1 J
C. 39.2 J
D. 3.92 J
Answer: C. 39.2 J
A. 5 N
B. 10 N
C. 15 N
D. 22 N
Answer: D. 22 N
Q: The Propulsion force of a rocket
is?
A. Conservative force
B. Non-conservative force
C. Both (A) and (B)
D. None of these
Answer: B. Non-conservative force
Q: When an arrow is released from its
bow, the transformation of energy is from?
A. Kinetic energy to potential energy
B. Potential energy to kinetic energy
C. Mechanical energy to thermal energy
D. Electrical energy to gravitational energy
Answer: B. Potential energy to kinetic energy
Q: Power is defined as?
A. The rate of doing work
B. The force applied to an object
C. The energy stored in an object
D. The distance traveled by an object
Answer: A. The rate of doing work
Q: In which type of field is the work
done in moving a body along a closed path always zero?
A. Conservative field
B. Non-conservative field
C. Uniform field
D. Non-uniform field
Answer: A. Conservative field
Q: Which of the following is a form
of potential energy associated with the stretching or compressing of an object,
such as a rubber band?
A. Gravitational potential energy
B. Elastic potential energy
C. Kinetic energy
D. Thermal energy
Answer: B. Elastic potential energy
A. It's mass only
B. Its velocity only
C. Both mass and velocity
D. Neither mass nor velocity
Answer: C. Both mass and velocity
Q: If an object is lifted to a
greater height, what happens to its gravitational potential energy?
A. It increases
B. It decreases
C. It remains constant
D. It becomes zero
Answer: A. It increases
Chapter Torque Angular momentum & Equlibrium
Q: _________ is rate change of angular momentum?
A. Force
B. Momentum
C. Torque
D. None of these
Answer: C. Torque
Q: If a body is rotating clock wise direction, the torque?
A. Maximum
B. Minimum
C. Negative
D. Positive
Answer:C. Negative
Q: What are the dimensions of torque?
A. ML T−2
B. ML2 T−1
C. ML2 T−2
D. ML T−1
Answer: C. ML2 T−2
Q: Two forces of equal magnitude, opposite in direction, and not acting along the same line? ?
A. Parallel forces
B. Antiparallel forces
C. Couple
D. Concurrent forces
Answer: C. Couple
Q: Torque is also called?
A. Momentum of inertia
B. Moment of force
C. Angular momentum
D. None
Answer: B. Moment of force
Q: Under what condition is the angular momentum of a particle conserved?
A. When the net force acting on the particle is zero
B. When the linear velocity of the particle is constant
C. When the net torque acting on the particle is zero
D. When the particle is at rest
Answer: C. When the net torque acting on the particle is zero
Q: What is the centre of mass?
A. The point where the body is lightest
B. The center of pressure within the body
C. The specific point of the body where all the mass is supposed to be distributed
D. The point at which the whole mass of the body is concentrated
Answer: D. The point at which the whole mass of the body is concentrated
Q: What is the term for the perpendicular distance between the line of action of a force and the axis of rotation?
A. Arm
B. Radius
C. Moment arm
D. Torque distance
Answer: C. Moment arm
Q: A body that satisfies the first condition of equilibrium is in?
A. Rotational equilibrium
B. Translational equilibrium
C. Dynamic equilibrium
D. None of the above
Answer: B. Translational equilibrium
Q: How is the direction of torque determined?
A. Left-hand rule
B. Right-hand rule
C. Both hands' rule
D. No specific rule for torque direction
Answer: B. Right-hand rule
Q: What does the second condition of equilibrium state ?
A. Force acting on the object must be zero
B. Net torque acting on the object must be zero
C. Both net force and net torque must be zero
D. The object must be at rest
Answer:B. Net torque acting on the object must be zero
Q: Which of the following is not a type of dynamic equilibrium?
A. Rotational equilibrium
B. Translational equilibrium
C. Mechanical equilibrium
D. Static equilibrium
Answer: D. Static equilibrium
Q: Question: What is the relationship between torque (τ), force (F), and moment arm (r)?
A. τ=F+r
B. τ=rF
C. τ=r⋅F
D. τ=F−r
Answer: C. τ=r⋅F
Q: What is the center of gravity?
A. The point where the entire mass of an object is concentrated
B. The point where the entire weight of an object is concentrated
C. The geometric center of an object
D. The center of pressure within an object
Answer: B. The point where the entire weight of an object is concentrated
Q: What is the dimensional formula for angular momentum ?
A. M L T−1
B. M L2 T−1
C. M L T−2
D. M L2 T−2
Answer: B. M L2 T−1
Q: What is the physical quantity responsible for producing angular acceleration is known as?
A. Angular velocity
B. Torque
C. Moment of inertia
D. Angular momentum
Answer: B. Torque
Q: An object in equilibrium may not have ?
A. Constant velocity
B. Acceleration
C. Non-zero net force acting on it
D. Unequal and opposite forces acting on it
Answer:B. Acceleration