1. A 1650-kg car is traveling at 36.7 m/s. How fast must a 91.0-kg bicycle and rider be traveling to have the same kinetic energy as the car?
2. A 47.3-g golf ball is driven from the tee with an initial speed of 51.6 m/s and rises to a height of 31.6 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 5.40 m below its highest point?
3.It takes 239 kJ of work to accelerate a car from 21.6 m/s to 27.5 m/s. What is the car's mass?