Question # 1

Newton's first law of motion is valid only in the absence of:

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Force

Not force

Friction

Momentum

___________ helps us to pick up objects.

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Force

Weight

Friction

Nil

Rocket works on principle of ______________

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Action Reaction

Law of inertia

Mass energy

Nil

A boy jumps out of a moving bus . There is danger for him to fall:

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Towards the moving bus

Away from the bus

In the direction of motion

Opposite to the direction of motion

The weight of body on earth with mass 8 kg is:

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10 N

100 N

80 N

8 N

The unit of momentum is :

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kgms^-1

kgms^-2

m sec

None

Formula of weight is derived from which law?

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First law

Second law

Third law

Law of conservation of momentum

Two bodies of masses m₁ and m₁ attached to the ends of an inextensible string passing over a frictionless pulley such that both move vertically. The acceleration of the bodies is:

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m1 x m₂ / m₁ + m₂ g

m₁ - m₂ / m₁ + m₂ g

m₁ + m₂ / m₁ - m₃ g

None of these

Weight is measured by:

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Spring balnce

Measuring cylinder

Physical balnce

None of these

Coefficient of friction between tyre and dry road is.

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0.6

1

0.05

0.2

A body has mass 986 Kg than W = ............... .

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9860 kg

9860 N

9860 m/s2

Nil

Waking on earth is the example of

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1st law of motion

Second law of motion

Third law of motion

Law of Momentum

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

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