13. A new ride has a radius of 50.0 m and a mass of 1.20X10^6 kg. If the torque of 1.0X10^9 N.m is needed to turn the ride from a state of rest, what would the ride's angular acceleration be. Treat the ride as a thin hoop.
14. When you are asleep in an unconscious state mice like to play. One night a 3.0 kg mouse for fun was hanging at the end of a 2.0m long string that is hanging from a pivot point. Calculate the magnitude of the torque due to the force of gravity around this pivot point when the string makes a 5.0-degree angle with the vertical. What is it when the angle is 15 degrees?
13. A new ride has a radius of 50.0 m and a mass of 1.20X10^6 kg....
A rock of mass 13 kg is tied to a string of length 2.5 m, with the other end of the string fastened to the ceiling of a tall room. While hanging vertically, the rock is given an initial horizontal velocity of 2.1 m/s. How high will the rock swing? Express your answer in terms of the angle θ that the string makes with the vertical when the rock is at its highest point.