Question # 1

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

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

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Greater than one degree

Less than one degree

Equal to one degree

None of these

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is

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0.05 m

0.08 cm

0.8 m

0.008 m

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

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Zero

Its average velocity

Its angular displacement

None of these

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

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Degree

Revolution

Radian

Metre

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

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

Direction of motion _______ in circular motion

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Changes off and on

Changes continuously

Does not change

None of them

In case of planets, the necessary acceleration is provided by:

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Gravitational force

Coulomb force

Frictional force

None of these

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

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

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

The number of countries who manage the largest satellite system is:

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3

24

126

200

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ECAT Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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