physics please respond
posted by katie .
A 0.130kg baseball pitched at 35.5 m/s is hit on a horizontal line drive straight back at the pitcher at 50.5 m/s .
Part a: If the contact time between bat and ball is 4.25×10^−3 , calculate the magnitude of the force (assumed to be constant) between the ball and bat.
part b)Determine the direction of the force exerted on a ball.
a)the force is directed towards the pitcher
b) the force is directed away from the pitcher.

physics please respond 
Delbarre
this exercise is conservation of linear momentum.
initial momentum: (0.130kg)(35.5)(i)
"remember linear momentum is vectorial.
i is vector direction and only the movement is in X"
= 4.615(i)
Final momentum is :
= (0.130)(50.5)(i)
=6.565(i)
then I=impulse
I= 6.565(i)  4.615(i)
I= 6.565(i)  4.615(i)
I= 11.18(i)
I= 11.18(i) Kgm/s
I=F.t
F=I/t= 11.18(i)Kgm/s/4.25×10^−3 s
F=2630.6 (Kgm/s² o N)
Enjoy the answer.
good luck 
physics please respond 
Delbarre
the magnitude of the force is 2630.6 N

physics please respond 
katie
thank you !

physics please respond 
Helen
What about part B please?
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