Question 21 : The physical quantity, which produces angular acceleration, is called:
1. Centripetal force
2. Torque
3. Angular velocity
4. Centrifugal force
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Question 22 : The line about which the body rotates is called:
1. Axis of rotation
2. Axis of rotation
3. Normal
4. Axis of rotation
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Question 23 : The direction of torque can be determined by:
1. Knowing the direction of r
2. Right hand rule
3. Knowing the direction of F
4. Left hand rule
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Question 24 : Torque is defined as the time rare of change of:
1. Linear velocity
2. Linear momentum
3. Angular momentum
4. Angular velocity
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Question 25 : The motion of the planets around the sun is an example of:
1. Spin motion
2. Rotatory motion
3. Orbital motion
4. Translatory motion
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Question 26 : The force, which is always directed towards the same point, is:
1. centripetal force
2. Gravitational force
3. Arbitrary force
4. Central force
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Question 27 : A particle moving with constant velocity may' be
1. accelerating
2. retarding
3. in equilibrium
4. moving in circle.
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Question 28 : The turning effect of force is called:
1. Momentum
2. None of these
3. Moment
4. Torque
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Question 29 : If every constituent particle of abody moves in a circle, the body is said to posses a:
1. Rotational motion
2. None of these
3. Translatory motion
4. Vibratory motion
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Question 30 : The physical quantity that produces angular acceleration is called
1. centripetal force
2. centrifugal force
3. torque
4. angular velocity
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