1st Year Physics Chapter 3 TestCircular and Rotational Motion

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which quantity of the following is dimensionless?

   1. Angular velocity

   2. Angular acceleration

   3. Centripetal force

   4. Angular displacement

2. Centripetal force performs:

   1. Maximum work

   2. Minimum work

   3. Negative work

   4. No work

3. In rotational motion, the torque is equal to rate of change of:

   1. Angular velocity

   2. Linear momentum

   3. Angular Momentum

   4. Angular acceleration

4. If a car moves with a uniform speed of 2ms^-1 in a circle of radius 0.4 m, its angular speed is:

   1. 4 rad s^-1

   2. 5 rad s^-1

   3. 2 rad s^-1

   4. 0.4 rad s^-1

5. If moment of inertia of a body becomes double, then angular momentum becomes:

   1. One half

   2. Double

   3. Three times

   4. Four times

6. 60^o is equal to:

   1. 

   2. 

   3. 

   4. 

7. All points on rigid body rotating about a fixed axis do not have the same:

   1. Speed

   2. Angular speed

   3. Angular acceleration

   4. Angular displacement

8. A body travelling in a circle at a constant speed:

   1. Has constant velocity

   2. Has an inward radial acceleration

   3. Is not accelerated

   4. Ha an outward radial acceleration

9. The direction of angular velocity is determined by:

   1. Left hand rule

   2. Head to tail rule

   3. Right hand rule

   4. General rule

10. If the radius of earth is increased to four times of the present, critical velocity v_o becomes:

    1. 

    2. 

    3. 2v_o

    4. None of these