1) A 2.26 kg book is dropped from a height of 1.5 m. What is the books accelartion ?
2) The parachute on a race car that weighs 6500 N opens at the end of a quarter-mile run when the car is traveling 40 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1100 m?