Question # 1

Direction of motion ______ in circular motion:

Choose an answer

Changes off and on

Changes continuously

Does not change

None of them

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

Choose an answer

980 N

580 N

1380 N

Zero

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

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

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

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38 m/sec

3.8 m/sec

0.6 m/sec

None of these

Direction of motion _________ in circular motion

Choose an answer

Changes off and on

Changes continously

Does not change

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:

Choose an answer

980 N

580 N

1380 N

Zero

Direction of motion _______ in circular motion

Choose an answer

Changes off and on

Changes continuously

Does not change

None of them

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

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8.1 X 10⁷N

625 N

6250 N

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

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

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KHz

MHz

GHz

BHz

When a 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

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

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

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

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