A (10.25) kg bowling ball is hung on a (11.50) m long rope. It is then pulled back until the rope makes an angle of (39.0) degrees with the vertical and released. Find the speed of the ball is at the lowest point. Give your answer in m/s and with 3 significant figures.

Answer 1

the ball is pulled back from the lowest point, and gains gravitational potential energy

this energy becomes kinetic energy when the ball is released
... it is maximum at the low point

m g h = 1/2 m v^2 ... v = √(2 g h)

use trig to find the height above the low point