CER: Law of Conservation of Energy Pre-Write
Students are performing a pendulum lab. The ball on the end of the
pendulum has a mass of 0.5 kg. At point A the pendulum is at the
top of its swing at 0.6 meter. At point C the potential energy is 0.6J.
Write a scientific explanation that answers the following question.
What is the velocity at point C?
(Assume the acceleration due to gravity, g, is 10 m/s2)
0.6 m

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?