Question # 1

As we go up the density of air in the atmosphere:

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Decreases

Increases

Remain constnat

None of these

GPS system consists of earth satellites:

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4

20

24

30

The transfer of heat by vibrating molecules in solids :

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Conduciton

Radiation

Convection

None

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

Which machine is used to find acceleration due to gravity?

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Centrifuge

Atwood machine

Hydraulic machine

Washing machine

The value of g is maximum at:

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Mountains

Maximum height

Surface of earth

At 2R

1 hp is equal to :

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747 W

746 W

748 W

1000 W

Two equal but unlike parallel forces having different lines of action produce:

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a Torque

a couple

Equilibrium

Netural equilibrium

Which types of friction is minimum?

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Sliding

Limiting

Rolling

None

Ability of body to do work due to its height is called.

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potential energy

kinetic energy

gravitational potential energy

elastic potential energy

The amount of matter in a body is called:

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Velocity

Momentum

Mass

Force

the to and fro motion of a body about its mean positionis called.

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Circular motion

Random motion

Rotatory motion

Vibratory motion

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

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Algebraic

Head to trail rule

Mathematical

Nil

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