Physics Asked by user2229336 on July 26, 2021
I already know sliding friction of ball on a flat table and rolling resistance of it.
How do I know coefficient of friction value when the ball has backspin with some angular velocity $omega$? And also when it overspins (spinning faster than it would when rolling).
Also, we consider a ball with sidespin (spin around z axis), but with no spin around other axes sliding?
Also, does sidespin affect the coefficient of friction at all?
The friction experienced by the ball/rolling object experiencing backspin or topspin will be the sum of sliding friction and rolling friction. This is because extra spin on the ball is just a linear combination of sliding and rolling. Putting sidespin will not affect the friction as long as it is perpendicular to the direction of motion.
Correct answer by Sam on July 26, 2021
The coefficient of dry friction is in general independent of the speed and therefore also of direction. Front/back spin will lead to forward acceleration/deceleration. Vertical spin will have no effect on forward motion.
Answered by my2cts on July 26, 2021
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