Question # 1

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

The rate of change of momentum is equal to

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Impulse

Torque

Velocity

Force

The equations of motion hold good for

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Variable acceleration

Uniform acceleration

Centripetal acceleration

All of these

For a rocket , the change in momentum per second of the ejecting gases is equal.

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Acceleration of the rocket

Momentum of rocket

Velocity of rocket

Thrust acting on rocket

When average velocity becomes equal to instantaneous than body is called moving with.

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Instantaneous acceleration

Constant acceleration

Constant velocity

Variable velocity

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

A mass of 1 kg is freely falling. The force of gravity is.

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1 N

9.8 N

0.5 N

Zero

A collision in which K.E. of the system is not conserved is

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Elastic collision

Inelastic collision

3rd low of motion

None of these

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

If a mass of a body is doubled, then acceleration becomes.

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Double

Half

One fourth

Constant

An immediate source of energy for our body is:

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mango

Glucose

mushroom

meat

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

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