Question # 1

The horizontal range of a projectile of 30^owith horizontal is same at an angle.

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40^o

45^o

90^o

60^o

Height of projectile is maximum at an angle of.

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45^o

60^o

30^o

90^o

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

A bullet shot straight up, return to its starting point in 10 sec. Its initial speed was

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9.8 ms-1

24.5 ms-1

49 ms-1

98 ms-1

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

The mass of a body is quantitative measure of its

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Motion

Inertia

Weight

All of these

When speed of a body is doubled then its

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K.E. is doubled

P.E. is doubled

Acceleration of doubled

Momentum is doubled

The time rate of change of momentum equals

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Weight

Applied force

Impulse

Mass

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

A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

A force of 10 N acts on a body of mass 5 kg in one second. The change in its momentum will be.

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10 kgms-1

50 kg ms-1

2 kg ms-1

20 kg ms-1

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