Question # 1

Orbital velocity v_o =

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√gR

√RG

gR

gR²

The average speed of cheetah is.

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60 kmh^-1

70 kmh^-1

75 kmh^-1

80 kmh^-1

Thermos flask, is used to maintain:

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Heat

Temperature

Density

Pressure

False celling is done to

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Lower the height of ceiling

Keep the roof clean

cool and room

Insulate the ceiling.

The velocity of bodies falling down

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Dwscreses

Increases

Zero

Constant

The method used for addition of non-parallel forces is.

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Algebraic

Head to trail rule

Mathematical

Nil

What is the effect of lubricicantion?

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Increase friction

No effect

Reduce friction

None

Thermal conductivity of iron is Wm^-1 K^-1

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85

36

89

86

Which one of the following units is not a derived unit?

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Pascal

Kilogram

Newton

Watt

A couple consists of how many forces:

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1

2

3

4

Fossil fuels are usually:

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Carbon di oxide

Hydrogen

Hydrocarbons

Carbon monoxide

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

Centripetal acceleration of a body is given by formula:

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a_c=v/r

a_c=mv²/r

a_c=v/r²

a_c=v2/r

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