Students were instructed to watch this ahead of class.
Do Now
Find PE and KE at three different position.
The Big Idea
Find velocity of the Bob at Equilibrium
Small Hint
Find PE = mgh at the maximum height.
Big Hint
Find Velocity of the Bob by PE = mgh at Max height
Exit Slip
Prove why Bob won't be able to kill Walter Lewin
Homework
A Pendulum Bob of mass 2 kg and rope length is 1 m. If the bob is pulled 0.71 m to the side, find maximum KE at equilibrium. Where is the Kinetic Energy of the Pendulum at a max? What about Potential?
