Question # 1

Which of the following is the unit of momentum?

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Nm

kgms^-2

Ns

Ns^-1

Co-efficient of friction between wood and concrete.

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0.63

0.8

1

0.9

Kgms^-2 is equal to:

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Joule

Mole

Newton

Watt

The centripetal acceleration is always along.

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Normal force

Centripetal forces

Mass

Horizental forces

The mass of a body

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Decreases when accelerated

Increases when accelerated

Decreases when moving with high velocity

None of the above

1 N ___________

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1 kgms^-2

1 kg ms^-1

ms^-2

All

A sugar bag of 1 kg has a momentum 25 kg m/s than its velocity is :

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v = 20 m/s

v = 25 kg

V = 25 m/s

v = 25 kg/ms-1

Which of the following material lowers friction when pushed between metal plates:

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Water

Fine marble poder

Air

Oil

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

Co-efficient of friction between glass and glass.

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1.0

0.9

1

0.8

Which of the following relation is correct?

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F = m/a

F = m-a

F = ma

F = m + a

Which parameter remain same every where?

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Force

Mass

Weight

Velocity

The unit of momentum is :

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kgms^-1

kgms^-2

m sec

None

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