Name Date Period UNIT 5 WORKSHEET 1: Work 1. How much work is done by the gravitational force when a 280kg pile driver falls 2.8m? 2. A 75kg firefighter climbs a flight of stairs 20m high. How much work is required? 3. What is the minimum work needed to push a 950kg car 310m up along a 90 incline? 4. A 6kg box is accelerated from rest by a force across a floor at a rate of 2m/s for 7s. Find the net work done on the box. 5. A 380kg piano slides 3.9m down a 27 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Determine the force exerted by the man, the work done by the man on the piano, the work done by the force of gravity, and the net work done on the piano