8. A ball of mass m strikes a wall perpendicularly with a speed v, and it...

Question

Question

8. A ball of mass m strikes a wall perpendicularly with a speed v, and it bounces off the wall perpendicularly with a speed v

Answer 1

Answer #1

impulse = change in momentum

Let the original direction of ball be positive , its means final velocity is in negative direction.

impulse = m ( final velocity - initial velocity)

impulse = m ( - v/3 - v)

impulse = 4mv / 3

option ( c) is correct.

Answer 2

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