posted by jewst on .
A bowling ball weighing 71.3 is attached to the ceiling by a rope of length 3.77 . The ball is pulled to one side and released; it then swings back and forth as a pendulum. As the rope swings through the vertical, the speed of the bowling ball is 5.00 .
Your weights, times and lengths have no dimensions. You have also not asked a complete question. Learn the importance of dimensions, and how to tell the known from the unknown variables.