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9th Class Physics Chapter 3 Dynamics English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

Choose an answer

5 N

25 N

20 N

30 N

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Question # 2

A body jumps out of a moving bus. There is a danger for him to fall:

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Towards the moving bus

Away form the bus

In the direction of motion

opposite to the direction of motion

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Question # 3

Newton's first law of motion is known as law of ___________________

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Force

Inertia

A and B both

None

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Question # 4

Formula of weight is derived from which law?

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First law

Second law

Third law

Law of conservation of momentum

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Question # 5

How much force is needed to body of mass 10 kg from falling:

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100 N

150 N

200 N

300 N

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Question # 6

___________ helps us to pick up objects.

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Force

Weight

Friction

Nil

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Question # 7

When a horse pulls a cart , the action is on the :

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Cart

Earth

Man

Earth & cart

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Question # 8

Which law of motion is called law of inertia:

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first law of motion

Second law of motion

Third law of motion

Law of conversation of momentum

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Question # 9

Sliding friction can be converted into rolling friction by using

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Levers

Wedges

Ball bearings

Pulleys

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Question # 10

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

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Question # 11

If the weight body is greater then tension then body will.

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Move upward

move downward

not move

None

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Question # 12

When the cyclist stop pedalling, bicycle stops due to :

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Friction

Momentum

Weight

Mass

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Question # 13

The formula of momentum is:

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P=Fa

P=mv

F=ma

F=mg

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