Question # 1

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

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Force

Not force

Friction

Momentum

________ is used to measure the force or weight of a body :

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Physical balance

Spring balance

A and B both

None

The weight of a body of mass 20 kg is:

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2 N

10 N

20 N

200 N

All forces are example of contract forces except:

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Air resistance

Tensional

Push force

Gravitational

The product of mass and velocity is called ................. .

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Momentum

Force

Acceleration `

Nil

Product of mass and velocity of a body is called.

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Torque

Force

Work

Momentum

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

If radius of circle is doubled then centripetal acceleration becomes:

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Doubled

Three times

Four times

Half times

What is the effect of lubricicantion?

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Increase friction

No effect

Reduce friction

None

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

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