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

Exercise 39

A block with a mass m 1 = 6.0 kg sitting on a frictionless table is connected to a suspended mass m 2 = 2.0 kg by a light string passing over a frictionless pulley. Using energy considerations, find the speed at which m 2 hits the floor after descending 0.75 m. ( Note : A similar problem iii Example 4.6 was solved using Newton's laws.)