a tennis ball of mass m strikes the massive wall with velocity v and traces the same path.calculate the change in momentum

change in momentum =final-initial

initial =mv
final=-mv
change= -mv-(mv)=-2mv

momentum before: mv

momentum after: m(-v)

now just subtract to get the change.

To calculate the change in momentum, we need to find the initial momentum and the final momentum.

The momentum of an object is calculated by multiplying its mass and velocity. Therefore, the initial momentum (p_initial) of the tennis ball is given by:

p_initial = m * v

Since the ball traces the same path, it will bounce off the wall and move in the opposite direction. The final velocity (v_final) will have the same magnitude as the initial velocity but in the opposite direction. So the final velocity is -v.

The final momentum (p_final) is then calculated as:

p_final = m * (-v) = -m * v

The change in momentum (Δp) can be found by subtracting the final momentum from the initial momentum:

Δp = p_final - p_initial
= (-m * v) - (m * v)
= -2mv

Therefore, the change in momentum is -2mv.

Very nice