A circus man whose mass is 60 kg is standing on a platform 20 m above the ground while holding a trapeze which is 10 m long that is attached to the ceiling which is 26 m above the ground. The circus man swings and lets go of the upswing. Determine the potential energy relative to the ground in each of the following position of the circus man: a. 20.0 meters on the platform b. 16.0 meters at the bottom of the swing c. 18.0 meters and lets go of the trapeze

A student pushes a baseball of m = 0.15kg down onto the top of a vertical spring that has its lower end fixed to a table, compressing the spring a distance of d = 0.16 meters froms its equailibrium length. The springs constant of the spring constant k = 610 N/m. Let the gravitional potential energy be zero at the position of the baseball in the compressed spring.   a. what is the maximum height, h, in meters, that the ball reaches above the equilibrium point? b. What is the ball's velocity, in meters per second, at half of the maximum height relative to the equilibrium point

A spring with spring constant k is attached to the floor, standing vertically. You place a box of mass m on the spring and, from rest, release it. The spring bounces up and down a few times and comes to rest (both its velocity and acceleration are zero). Find the thermal energy generated in this process in terms of m, g, and k. Answer Options: A. mg/k   B. m^2 g/k C. m^2 g^2/k   D. m^2 g^2/ 2k   E. mg/2k

1. Which of the following is NOT an example of potential energy? a. A running woman b. An incredibly compressed spring C. A tightly stretched rubber band d. An apple dangling off a branch 2. A ball drops from a height h. What more do we need to calculate initial potential energy? a. Elasticity of the Ball b. Mass c. Final Velocity d. Horizontal Displacement