Author Question: Someone hits a tether ball to make it spin around a pole. The cord that attaches the tether ball to ... (Read 59 times)

HCHenry · **on:** Jul 28, 2018

Someone hits a tether ball to make it spin around a pole. The cord that attaches the tether ball to the central pole then winds around the pole. What happens to the angular speed of the tether ball during this process?
1.It decreases.
2.It increases.
3.It remains constant.
4.It cannot be determined.

Question 2

A popular demonstration involves a professor, initially motionless, standing on a low-friction turntable and holding a bicycle wheel that is spinning horizontally. What happens when the professor flips the bicycle wheel so that it is spinning in the other direction?
1.She starts to spin in the same direction as the initial direction of the bicycle wheel.
2.She starts to spin in the bicycle wheel's new spin direction.
3.She remains stationary.
4.It is impossible to tell because it depends on how fast the bicycle wheel initially spins.