Question

When two bodies approach each other unilohiy, u
20s. If they move in the same direction, distance between them increases by 6 m for every in
velocities of those two bodies are
​

Answer 1

Answer:

Explanation:

Given:

Two 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 them.