Hello,
I am having a problem with #40 (baseball reaching batter at 32 m/s). I can't seem to get 114 m/s for the speed of the outgoing ball. How should I approach this problem.
Thanks.
Manuel, the key to the problem is that it is an elastic collision. Use the relative velocity formula for elastic collisions: (v sub 1 minus v sub 2) = -(v prime sub 1 minus v prime sub 2). v prime is the velocity of the objects after the collision. Have the baseball initially moving in the positive x direction. The bat is moving in the neg x direction with the same speed both before and after the collision. If that doesn't help, please let me know and I'll post the solution. John
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