1. The problem statement, all variables and given/known data Video was recorded with a 240 fps camera. It took 93 frames for the pendulum to go from 90 deg to the bottom. The pendulum length is 51 cm. 2. Relevant equations Find the max velocity 3. The attempt at a solution From the simple pendulum equation, I should get around 11.36 km/hr. Given that its 51 cm, with a 90 deg angle. If it takes 0.3875 seconds, based off that each frame has 0.004 seconds.. 0.0041667 sec * 93 = 0.3875 seconds. Then velocity is 51cm(difference in height)/ 0.3875seconds = 131.613 cm/s and when converted to km/hr it results in 4.738 km/hr! Roughly half of the theoretical. Is it the height that I am not thinking correctly?