Question 51 : The rate of change of angular velocity with respect to time defines?
1. Angular momentum.
2. Angular displacement.
3. Angular acceleration.
4. None of these.
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Question 52 : The unit of angular acceleration in S.I units is?
1. rad.s^-2
2. rad.s^-1
3. rad.s²
4. rad².s
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Question 53 : When angular velocity changes with respect to time then?
1. an angular acceleration is produced
2. a linear acceleration is produced
3. a linear velocity is produced
4. it constitute a couple
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Question 54 : The work done by the centripetal force is always?
1. Negative
2. positive
3. Zero
4. None of these
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Question 55 : When an object rotates about a fixed axis, every point in the object moves in a?
1. ellipse whose center is on the axis of rotation
2. straight line
3. circle whose center is on the axis of rotation
4. parabolic path
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Question 56 : A car traveling at 70 Km/ hr east turns south without a change in speed. The car is moving with?
1. acceleration
2. uniform velocity
3. None of these
4. average velocity
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Question 57 : One degree (1°) is equal to? (a) (b) (c) (d)
1. 7.1745 rad
2. 0.01745 rad
3. 0.001745 rad
4. 0.1745 rad
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Question 58 : One radian is equal to ?
1. 57.3°
2. 59.3°
3. 53.7°
4. 57.7°
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Question 59 : In projectile a body moves with?
1. constant horizontal component of velocity
2. both changing horizontal and vertical components of velocity
3. horizontal component changing but vertical component of velocity constant.
4. constant vertical component of velocity
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Question 60 : The angular velocity depends upon the rate of change of the?
1. Angular acceleration
2. Angular Distance.
3. Angular Displacement.
4. torque
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