Question # 1

Sliding friction can be converted into rolling friction by using

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Levers

Wedges

Ball bearings

Pulleys

In which hot liquid can remains hot:

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Glass

Lead

Thermos

Hot pot

Due to _____________ we can watch live programs.

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Natural Satellite

Antenna

Artificial satellite

Nil

Sin 45 is equal to:

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Zero

0.5

0.707

1

A black dull surface is a good ________ of heat:

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Emitter

Absorber

Reflector

Both A and B

The unit of momentum is:

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kgms^-2

kgms^-1

Ns^-1

None of these

Relation between force and momentum is:

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ΔP/F

ΔP/t

ΔPF

None

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

The earth attracts us due to its __________ mass:

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Little

Zero

Small

Large

One Megawatt is equal to :

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1 × 106 w

1 × 102 kw

1015 w

Nil

A boy jumps out of a moving bus . There is danger for him to fall:

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Towards the moving bus

Away from the bus

In the direction of motion

Opposite to the direction of motion

Perpendicular / hypotenuse is equal to:

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Cosθ

Tanθ

Cosecθ

Sinθ

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

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Direction

Opposite

Same

None of these

Center of gravity of an irregular shaped body can be found with help of:

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Screw guage

Plumbline

Meter rode

Wedge

The single force that has the same effect as the combined effect of all the force to be added is called a

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Opposite force

Single force

Resultant force

Resultant vector

To every action there is always an equal but __________ reaction:

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Same

Parallel

Opposite

Equal

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