- #1
jaron
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Homework Statement
a 0.144kg baseball is pitched horizontally at +38m/s. after it is hit by a bat, the baseball moves horizontally at -38m/s.
a) what impulse did the bat deliver to the ball
b) if the bat and the ball were in contact for 8.0*10^-4 seconds, what was the average force that the bat exerted on the ball?
c) find the average acceleration of the ball during its contact with the bat.
Homework Equations
J = Ft
Ft = mv1 - mv2
The Attempt at a Solution
a) Ft = mv Ft = 0.144 * -38 Ft = -5.472 kg m/s (they got -11 kg m/s)
b) F(.0008) = 5.472
F = 5.472/.0008
F = 6840 N (they got 14000 N)
c) F = ma 6840 = 0.144a a = 6840/0.144 a = 47500m/s^2 (they got 97000m/s^2)
i know i am doing something seriously wrong here but i have no idea what??