Question # 1

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

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

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

Satellites are held in orbits around Earth by its:

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Gravitational field

Magnetic field

Own orbital motion

Own spin motion

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

Centripetal acceleration is also called _______ acceleration:

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Tangential

Radial

Angular

None of them

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

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KHz

MHz

GHz

BHz

In case of planets, the necessary acceleration is provided by:

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Gravitational force

Coulomb force

Frictional force

None of these

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

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5 rad/sec²

-10 rev/sec²

-10 rad/sec²

-5 rev/sec²

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°

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

The number of countries who manage the largest satellite system is:

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3

24

126

200

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

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3

24

126

200

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

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0.05 m

0.08 cm

0.8 m

0.008 m

The useful unit of angular replacement in SI unit is:

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Degree

Revolution

Radian

Metre

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