Question # 1

Co-efficient of friction between iron and iron is:

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1.0

0.62

0.9

1.2

Inertia depends upon:

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Weight

Mass

Density

Force

Friction causes _____________

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Heat

Light

Mass

Weight

A ball of mass 1 kg moving wih velocity 2 ms^-1 its momentum will be;

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1 Ns

2 Ns

0.5 Ns

4 Ns

The weight of a body of mass 20 kg is:

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2 N

10 N

20 N

200 N

Friction is caused by :

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Shining surface

Rough surface

Polished surface

Nil

The formula of momentum is:

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P=Fa

P=mv

F=ma

F=mg

Which of the following is the unit of momentum?

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Nm

Kg ms^-2

Ns

Ns^-1

If the mass of body is doubled while keeping the force contant, then acceleration will be:

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Doubled

One half

4 times

One fourth

Rate of change of momentum is equal to:

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Mass

Torque

Weight

Force

When a horse pulls a cart , the action is on the :

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Cart

Earth

Man

Earth & cart

Which types of friction is minimum?

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Sliding

Limiting

Rolling

None

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