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

Question # 1

Momentum is defined as the product of

Choose an answer

Mass and acceleration

Force and acceleration

Mass and velocity

Force and velocity

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Question # 2

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 # 3

If a 20 N wight of block hang with the string vertically then tension in string is:

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0 N

20 N

2 N

10 N

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Question # 4

The momentum of two or more than two bodies intersacting remain constant in:

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Law of inertia

Isolated system

System

None

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Question # 5

The velocity and acceleration of the body moving with uniform speed in a circular path will be:

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In same direction

In opposite direction

Mutually perpendicular

Equal

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Question # 6

If the mass of body is doubled while keeping the force contant, then acceleration will be:

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Doubled

One half

4 times

One fourth

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Question # 7

The unit of π is:

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None

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Question # 8

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

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Question # 9

Mass is measured by:

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Spring balance

Measuring cylinder

Physical Balance

None of these

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Question # 10

Rocket works on principle of ______________

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Action Reaction

Law of inertia

Mass energy

Nil

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Question # 11

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

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Question # 12

The weight of body is 147 N, Its mass will be ________ when g = 10 ms^-2

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1.47 kg

14.7 kg

47 kg

1.51 kg

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