Question # 1

At sea level , Atmosphere pressure is:

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101,300 Pa

101,400 Pa

101,500 Pa

101, 600 Pa

Paratrooper while coming down attains a velocity called.

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Variable velocity

Uniform velocity

Average velocity

Terminal velocity

Transfer of heat by actual movement of molecules form hot place to cold place is called:

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Conduction

Convection

Radiation

None

Orbital velocity v_o =

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√gR

√RG

gR

gR²

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 of the following is the unit of momentum?

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Nm

Kg ms^-2

Ns

Ns^-1

S.I unit of G is:

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Nm^-2 kg²

Nm^-2Kg^-2

Nm²kg^-2

Nm²kg^-3

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

The value of g on moon's surface is 1.6 ms-2. What will be the weight of a 100 kg body on the surface of the moon?

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100 N

160 N

1000 N

1600 N

An ideal system gives output:

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50%

60%

80%

100%

A silvery white surface is a :

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Worst reflector

Best reflector

Worst absorber

Best absorber

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

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Inertia

Gravity

Car force

Nil

The energy possessed by a body due to height is called:

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P.E

K.E

Both

None

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