Question

two balls A and B of masses M and 2m are moving with velocities 2v and One V respectively compare inertia of two walls momentum of two balls

Answer 1

$p = mv = m \times 2v = 2vm\\ p = mv = 2m \times v = 2mv$

Answer 2

Answer:

ETwo balls A and B of mass m and 2m

Initial velocity of first ball =2V

Initial velocity of second ball= V

1)Compare inertia:

As inertia is measure of mass. Hence the object with greater mass has more mass.

So, Ball B is having more inertia.

2)Compare momentum:

Momentum is the product of mad and velocity.

P= mxv

So Pa=mx2v=2mv

Pb=2mxv=2mv

So, momentum in both the cases are same.

3)The force needed to stop them in same time:

From Newton's second law:

F= dp/dt

= change in monentum/dt

= 0-2mv/time

As momentum is same for given time , so same force is required to stop th em

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