Question # 1

The useful unit of the angular displacement in SI unit is:

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Degree

Revolution

Radian

Metre

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

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2.5 sec

0.06 sec

15.7 sec

0.4 sec

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

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3

24

126

200

Conventionally the angular velocity is directed to an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of the above

An axis of rotation

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Is a straight line

Is normal to the plane of rotation

Passes through pivot point O

All of them

One radian is equal to:

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30.3°

45.3°

50.3°

57.3°

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

Conventionally the angular velocity is directed at an angle of

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of the above

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of them

When a body moves with a constant speed in a circle:

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No work is done on it

No acceleration is produced in the body

Velocity remains constant

None of these

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

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10 m

12 m

13 m

15 m

Centripetal acceleration is also called ______ acceleration:

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Tangential

Radial

Angular

None of them

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

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