Q1. A monkey hangs stationary at the end of a vertical vine. What two forces act on the monkey? Which, if either, is greater?
Q2. A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
What is the magnitude of train's angular acceleration after it is released?
How long does it take the train to stop if it's released with an angular speed of 32rpm?