Can somebody help me with this problem, it is probably pretty easy but I can not seem to think of how to solve it. A object initially located at point A on the rim of a grinding wheel rotating about a horizontal axis. The object is dislodged from point A when the diameter through A is horizontal. It then rises vertically and returns to A the instant the wheel completes one revolution. Find the speed of a point on the rim if the radius is 1.153 m.