In: Physics
A box with an inertia of 2kg is held on a 1m high table against a spring with k = 75N which is initially compressed 0.5m. The coefficient of friction between the box and the table is 0.2. The spring is released, and it pushes the box until it reaches its equilibrium length. At this point, the spring is stopped by a stopper and the box continues to slide across the table with only the force of friction acting on it. After losing contact with the spring, the box travels the distance of the rest of the table, another 0.5m, where it then flies off the end of the table and lands on the floor. Assuming no air resistance,
(a) What was the net work done on the box while it was being pushed by the spring?
(b) What was the net work done on the box from the time it left the spring until it reached the edge of the table?
(c) How fast was the box moving when it flew off the table?
(d) How far from the table did the box land?