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

Question # 1

Centripetal force always acts _________ to the motion:

Choose an answer

Opposite

Parallel

Perpendicular

Upward

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Question # 2

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 # 3

Which of the following relation is correct?

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F = m/a

F = m-a

F = ma

F = m + a

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Question # 4

Mass is measured by:

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Spring balance

Measuring cylinder

Physical Balance

None of these

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Question # 5

A force of 20 N is acting on a body of mass 8 kg,Its acceleration will be

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2.5 ms-2

4.5 ms-2

5.5 ms-2

3.5 ms-2

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Question # 6

When a force of 4 Newton is applied on a body of mass 2 kg, the acceleration produced in it will be:

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2 ms^-2

4 ms^-2

8 ms^-2

6 ms^-2

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Question # 7

In symbols, Newton's second law of motion is stated as

Choose an answer

F = m/a

F = ma

F = a/m

F = ma²

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Question # 8

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

Choose an answer

Doubled

Half

4 times

Same

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Question # 9

The unit of momentum is:

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kgms^-2

kgms^-1

Ns^-1

None of these

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Question # 10

In velocity the body become double , then centripetal force will be:

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Half

Three times greater

Double

Four times greater

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Question # 11

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 # 12

The product of mass and _______ is called momentum;

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Velocity

Force

Acceleration

None

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Question # 13

Outer edge of the curved road is elevated to prevent

Choose an answer

Circular motion

Centripetal force

Skidding

Protection

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