College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 8

You are traveling north and make a 90° right-hand turn east on a flat road while driving a car that has a total weight of 3600 lb. Before the turn, the car was traveling at 40 mi/h, and after the turn is completed you have slowed to 30 mi/h. If the turn took 4.25 s to complete, determine the following: (a) the car's change in kinetic energy, (b) the car's change in momentum (including direction), and (c) the average net force exerted on the car during the turn (including direction).