Question # 1

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

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The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

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Zero

Mg

2 mg

3 mg

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

INTELSAT VI satellite operates at microwave frequencies of.

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2,4,6,10 GHz

4,6,11 and 14 MHz

4,6,11 and 14 GHz

2,4,6 AND 14 GHz

One revolution is equal to.

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90^o

180^o

360^o

270^o

The diver spin faster when moment of inertia becomes.

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smaller

Greater

Constant

Equal

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

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

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

Close orbiting satellites orbit the earth at a height of about

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400 km

4000 km

400 m

400 cm

The maximum velocity necessary to put a satellite into orbit is

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7.1 kms-1

7.3 kms-1

7.9 kms-1

8,9 kms-1

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

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

As we go from pole to equator of earth, the value of 'g'

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Increase

Decrease

Remain constant

Zero

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