Question # 1

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

Angular momentum is a:

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vector quantity

Imaginary quantity

Complex Quantity

Scalar Quantity

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

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

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KHz

MHz

GHz

BHz

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

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9.42 rad/sec

2.6 rev/sec

1.5 rev/sec

Both A and C

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

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

A body can have constant velocity when it follows:

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A circular path

A rectilinear path

Trajectory of a projectile

None of these

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

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

Which of the following pairs does not have identical dimensions?

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Torque and energy

Energy and work

Momentum and impulse

Mass and moment of inertia

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

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

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

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Greater than

smaller than

Equal to

None of these

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

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0.05 m

0.08 m

0.8 m

0.008 m

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

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

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