Question # 1

The direction of angular acceleration is

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Along the axis of rotation

Perpendicular to the axis of rotation

Opposite to axis of rotation

None of these

When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by

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Mass of body

Velocity of a body

Tension in the string

Centripetal acceleration

The amount of inertia of 10 kg hoop about the axis of rotation perpendicular to its plane having radius 5 m is

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50 kgm2

100 K gm2

150 K gm2

250 K gm2

Which one of the following force cannot do any work on the particle on which it acts.

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Fractional force

Gravitational force

Electrostatic force

Centripetal force

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

Angular acceleration is produced by

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Power

Torque

Pressure

Force

The angular acceleration a =

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Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

One revolution is equal to.

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90^o

180^o

360^o

270^o

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

100 radians are equal to.

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57.3^o

75.3^o

573^o

5730^o

The orbital angular momentum is associated with the motion of a body along

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Straight path

Circular path

Curved path

Along any path

Time rate of change of angular displacement is called

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Linear velocity

Angular velocity

Rotational velocity

Vibrational velocity

How many orbiting satellites from the Global positing system.

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3

12

24

22

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