3. A 0.145 kg ball moving horizontally at 20 m/s is struck by a bat that causes the ball to move in the opposite direction at 15 m/s. If the ball and bat were in contact for 5 ms, how much force did the bat

apply to the ball?

F = 1015 N

Explanation:

Given that,

Mass of a ball, m = 0.145 kg

Initial speed, u = 20 m/s

Final speed, v = -15 m/s (as it moves in opposite direction)

The ball and bat were in contact for 5 ms

We need to find the force the bat applies to the bat. We know that,

F = ma

So, the bat will apply 1015 N force to the ball.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue