This document contains multiple physics exercises involving work, energy, and motion. Exercise 1 involves analyzing the motion of a falling object subject to drag forces. Exercise 2 looks at the motion of a box sliding down a ramp and jumping to a platform. Exercise 3 analyzes a pulley system with masses of different sizes where one mass experiences drag forces. Exercise 4 considers the motion of a diver jumping off a cliff into the ocean. The exercises require determining changes in kinetic and potential energy, work done by forces, and other energy concepts.