Question # 1

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

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of them

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

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

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KHz

MHz

GHz

BHz

One radian is equal to:

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30.3°

45.3°

50.3°

57.3°

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

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

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980 N

580 N

1380 N

Zero

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

Einstein's theory about gravity if better than Newton's because it gave explanation of:

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Inverse square law

Bending of light

Both A and B

None of above

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

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

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Along the tangent

Toward the centre

Away from the centre

None of them

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

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

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

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Increase

Decrease

Remain constant

None of these

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ECAT Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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