Problem 1. A tugboat exerts a constant force of 4000N toward the right on a ship, moving it a distance of 15m. What work is done?
Problem 2. A worker lift a 40-lb weight through a height of 10ft. How many meters can a 10-
kg block be lifted by the same amount of work?
Problem 3. A 10-kg block is dragged 20m by a parallel force of 26N. If μ = 0.2. What is the
resultant work and what acceleration results?
Problem 4. A 40-kg sled is pulled horizontally toward the right for 500m (μ = 0.2). If the
resultant work is 50kJ. What was the parallel pulling force?
Problem 5. What is the change in Kinetic energy when a 50-g ball hits the pavement with a
velocity of 16m/s and rebounds with a velocity of 10m/s?
Problem 6. What is the kinetic energy of a 2400kg automobile when its speed is 55m/s?
Problem 7. A 20-g projectile strikes a mud bank penetrating a distance of 6cm before
stopping. Find the stopping force F if the entrance velocity is 80m/s.