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1.Momentum of the objects tells us about?

object mass.

object velocity

how difficult it to stop it

object weight

2) which of these statement is not true?

Momentun is product of mass and velocity

If a net force acts on the systems,it momentum will change

A heavy object will always have higher momentum than lighter object

Impulse is the product of Force and time applied

3.Which one of the following equations is not dimensionally correct? Following things are given

v => is a speed (L/T)

a => is an acceleration (L/T

x => is a distance (L)

t => is a time (T)

M => is a Mass (M)

F => is a force (ML/T

p => is a momentum ( ML/T)

p

F=d(mv)/dt

m(dv)+v(dm)=F

none of these

After the explosion the momentum of all the pieces, exhaust and smoke add up to zero.

After the explosion the momentum of all the pieces, exhaust and smoke add up to non zero

Total momentum is increased an energy is released by the explosion

none of the above

5. A 5 g rubber ball and a 5 g clay ball are thrown at a wall with equal speeds.

The rubber ball bounces, the clay ball sticks. Which ball exerts a larger impulse on the wall?

They exert equal impulses because they have equal momenta

The clay ball exerts a larger impulse because it sticks

The rubber ball exerts a larger impulse because it bounces.

Neither exerts an impulse on the wall because the wall doesn’t move

6.A small car had a headon collison with bigger truck. The impulse exerted by the truck on car

is less than impulse exerted by car on truck

is equal to impulse exerted by car on truck

is greater to impulse exerted by car on truck

Insufficent information

7.An open truck rolls along a frictionless track while it is raining. As it rolls, what happens to the speed of the

truck as the rain collects in it? (assume that the rain falls vertically into the box) ?

it increase

it decrease

remains same

Insufficent information

8.Which of these is false?

Momemtum is conserved in elastic collision only not in inelastic collision

When net force on the system is zero, Total momentum of the system remains conserved

When two objects collides and completely bounce back with no deformation and no generation of heat,the collision is said to be elastic

None of the above

9.Robert (120 kg) and Bill (60 kg) are standing on slippery ice and push off each other.

If Bill slides at 6 m/s, what speed does Robert have have?

12 m/s

6 m/s

8 m/s

3 m/s

10.Two boxes P and Q, having mass m

P

Q

Both have same momentum

insufficent information

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