What is the ball’s speed at the lowest point of its trajectory?

What is the ball’s speed at the lowest point of its trajectory? A pendulum is made by tying a 530 g ball to a 52.0 cm-long string. The pendulum is pulled 21.0-degree to one side, then released. Using trig, first calculate the ball’s vertical displacement at its highest point, i.e. when the string is at … Read more