- #1
mintsnapple
- 50
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Homework Statement
Homework Equations
Tangential v = wr
The Attempt at a Solution
I first drew a force diagram for when the ball contacts the floor.
Topspin means the ball is moving tangentially backward.
Therefore, the bottom moves at v - wR. Friction works opposite in the direction of motion, so it will slow it down if v > wR, but it will speed it up if v < wR. Therefore, in order for there to be no change, v = wR, so w = v/R