Question # 1

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

The instantaneous acceleration of a body moving with constant speed in a circle:

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Remains constant

Is called centripetal acceleration

Tangential acceleration

None of these

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

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3

24

126

200

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

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

The useful unit of angular replacement in SI unit is:

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Degree

Revolution

Radian

Metre

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

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

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

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

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

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Radius of the circle

Twice the radius

Thrice the radius

None of these

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

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Along the tangent

Towards the centre

Away from the centre

None of them

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

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5 rad/sec²

-10 rav/sec²

-10 rad/sec²

-5 rav/sec²

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

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Physics ECAT Pre Engineering Chapter 5 Circular Motion Online Test MCQs With Answers

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