write down the kinetic energy of a ball just before impact with the concrete surface with mass 50g and height 2.5cm

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves