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

تمرين 128

A 2.50-kg block is placed on a rough surface inclined at 30°. The block is propelled and launched at a speed of 1.60 m/s down the incline and comes to rest after sliding 1.10 m (a) Draw the free-body diagram of the block while it is sliding. Also indicate your coordinate system axes. (b) Starting with Newton's second law applied along both axes of your coordinate system, use your free-body diagram to generate two equations. (c) Solve these equations for the coefficient of kinetic friction between the block and the incline surface. [ Hint : You will need to first determine the block's acceleration.]