Motion and Force

11.

1st law of motion gives the definition of

A.	rest	B.	motion
C.	velocity	D.	force

12.

2nd law of motion gives the definition of

A.	force	B.	acceleration
C.	velocity	D.	both force and acceleration

13.

3rd law of motion explains

A.	effect of force	B.	existence of a force
C.	existence of two forces	D.	existence of pair of forces in nature

14.

Momentum depends upon

A.	force acts on the body	B.	mass of the body
C.	velocity of the body	D.	both mass and velocity of the body

15.

The dimension of force is

A.	MLT-2	B.	ML2T-2
C.	ML2T2	D.	ML-2T-2

16.

When a body moves in a straight line then its displacement coincides with

A.	distance	B.	force
C.	acceleration is zero	D.	both (a) and (b)

17.

Which of the following pair has same direction always?

A.	force, displacement	B.	force, velocity
C.	force, acceleration	D.	force, momentum

18.

Motorcycle safety helmet extends the time of collision hence decreasing the

A.	chance of collision	B.	force acting
C.	velocity	D.	impulse

19.

The collision between two bodies be elastic if bodies are

A.	solid and soft	B.	soft and elastic
C.	solid and hard	D.	hard and elastic

20.

During long jump, athlete runs before taking the jump. By doing so he

A.	provide him a larger inertia	B.	decreases his inertia
C.	decreases his momentum	D.	increases his momentum

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