posted by flirtyme .
A baseball bat hits a ball with an average force of 970N that acts for 0.0088s.
a) what impulse was given to the ball/
b)What was the change of momentum of the ball?
c)The ball was hit back in the same direction that it came from. If its speed before being hit was 32ms-1, what was its speed afterwards? (Mass of baseball was 145g)
please help I would really appreciate you for the rest of my life. and is physics that important? its hard for nothing really
Force * time = impulse or change of momentum
a) so Impulse = 970*0.0088
b) As I said, impulse IS change of momentum
c) initial momentum = -.145*32
(calling negative speed from pitcher to batter, positive from batter to center field)
The change of momentum is up in parts a and b
.145 v = -.145*32 + answer to part b