Question # 1

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

Artificial gravity can be created in the space ship by

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Revolving around the earth

Spinning around its own axis

Increasing its velocity

Decreasing it svelocity

Einstein's theory gives us the physical picture of how the

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Body moves

Gravity works

Moment of inertia produced

Weightlessness creates

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

The SI unit of angular momentum is

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J.S-2

J.S-1

J.S

J.m

A man of mass 5 kg is falling freely, the fore acting on it will be

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5 N

9.8 N

19.6 N

49 N

The rate of change of angular velocity is called

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Angular velocity

Angular acceleration

Angular displacement

Angular speed

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

Which one of the following is into directed along the axis of rotation

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Angular acceleration

Angular momentum

Centripetal acceleration

Angular displacement

Which is unimportant in describing the satellites orbit.

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Distance of satellite from earth's center

Gravitational constant G

Mass of satellite

Mass of earth

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

The direction of angular velocity is determined.

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Left hands rule

Head to tail rule

Right hand rule

General rule

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

A 60 kg man in an elevator is moving upward with an acceleration of 9.8 ms-2. The apparent weight of the man.

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Increase

Decreases

Remain constant

Becomes zero

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