Question # 1

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

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

The diver spins faster when moment of inertia becomes.

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smaller

Greater

Constant

Zero

The moment of inertia is analogue to

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Mass

Weight

Torque

Force

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

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

The angular acceleration a =

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International Telecommunication satellite

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4,6,8 and 10 Hz

4,6,11 and 14 GHz

4,6,8 and 12 Hz

4,8,11 and 16 GHz

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

All point of the rigid body rotating about a fixed axis do not have same.

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Angular acceleration

Angular speed

speed

Angular displacement

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

In rotational motion the torque is equal to rate of change of

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

The centripetal force is always directed

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Away from the centre along the radius

Along the direction of motion

Opposite to the motion of the body

Towards the centre along the radius

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

The angle between circumference of a circle and center is

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The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

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