Question # 1

Which parameter remain same every where?

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Force

Mass

Weight

Velocity

Rolling friction is___________ then sliding friction :

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Greter

Less

Some

Half

A string is stretched by two equal and opposite forces 10 N each. The tension in the string is

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Zero

5N

10N

20N

The static fraction between wood and lather is _______________

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0.6

0.7

0.9

0.8

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

Friction is caused by :

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Shining surface

Rough surface

Polished surface

Nil

A mass of a body:

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Decreases when accelerated

Increases when accelerated

Decreases when moving with velocity

None of the above

The acceleration produced in a moving body is always in the direction of applied

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Velocity

Force

Speed

Momentum

Centripetal force always acts _________ to the motion:

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Opposite

Parallel

Perpendicular

Upward

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

A ball of mass 1 kg moving wih velocity 2 ms^-1 its momentum will be;

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1 Ns

2 Ns

0.5 Ns

4 Ns

Sliding friction can be converted into rolling friction by using

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Levers

Wedges

Ball bearings

Pulleys

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

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Air resistance

Tensional

Push force

Gravitational

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

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