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

Question # 1

What is mass of body if W = 580 N ?

Choose an answer

5.8 Kg

0.58 kg

0.058 kg

58 kg

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Question # 2

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

Choose an answer

Towards the moving bus

In the direction of motion

away from the bus

Opposite to the direction of motion

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Question # 3

Coefficient of friction between tyre and dry road is.

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0.6

0.05

0.2

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Question # 4

Which of the following is the unit of momentum?

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kgms^-2

Ns^-1

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Question # 5

All divers need to wear seat belt because of effect of:

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Inertia

Gravity

Car force

Nil

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Question # 6

Newton's first law of motion is valid only in the absence of:

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Force

Not force

Friction

Momentum

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Question # 7

If the mass of moving body in a circle is doubled then centripetal force wil be:

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Doubled

Half

4 times

Same

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Question # 8

___________ helps us to pick up objects.

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Force

Weight

Friction

Nil

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Question # 9

Waking on earth is the example of

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1st law of motion

Second law of motion

Third law of motion

Law of Momentum

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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

Outer edge of the curved road is elevated to prevent

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Circular motion

Centripetal force

Skidding

Protection

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Question # 12

Sliding friction can be converted into rolling friction by using

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Levers

Wedges

Ball bearings

Pulleys

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Question # 13

Rate of change of momentum is equal to:

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Mass

Torque

Weight

Force

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