High-speed stroboscopic photographs show that the head of a 200-g golf club is traveling at 55 m/s just before it strikes a 46-g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 40 m/s. Find the speed of the golf ball just after impact.
1. Transforming energy A. Energy is not lost it is just converted to less important forms B. Work into a system: positive C. Work out of a system: negative D. Work includes electric energy into and out of motors and generators E. Energy output= energy input F. Thermal energy is irreversible a. Energy isn't lost but it is less efficient 2. Efficiency A. A. Larger the loss of energy in a system, the lower the efficiency a. Comes from 1. Process limitations 2. Fundamental limitations 1. 1. Energy in the body A. Energy inputs a. ATP b. Burning food transform