Question # 1

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

Friction causes _____________

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Heat

Light

Mass

Weight

The formula for centripetal force is:

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Fc = mv2

Fc = mr2

Fc = mv2 / r

Fc = m/v

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

A body has mass 986 Kg than W = ............... .

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9860 kg

9860 N

9860 m/s2

Nil

In circular motion, the motion of every particle of body is.

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Direction

Opposite

Same

None of these

2nd law of motion is stated as:

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F=m/a

F=ma

F=a/m

F=ma²

Sliding friction can be changed into rolling friction by using:

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Ball bearing

Roller bearing

Both a and b

None of these

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

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Inertia

Gravity

Car force

Nil

If the force of 25 N is acting along the string to balance the weight then tension in string is

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25 N

50 N

Zero

None

Action and Reaction are always on:

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Same body

Different bodies

Any body

None of these

The rage of change of momentum is equal.

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Mass

Force

Weight

None

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Physics 9th Class English Medium Unit 3 Online Test MCQs With Answers

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