1. What is the difference between Work done and Energy ? How are they related ? State at least two differences and two relations. 2. A 8.00 kg block slides down a 11.0 m long inclined plane. Let the velocity of the box at the bottom is 4.40 m/s and the height of the plane is 3.00 m. (a) Find the change in energy between the top and the bottom of the incline. (b) Find the work done by friction. (c) Find the angle of the incline (d) Find the friction coefficient pu.3. A box of mass 2.00 kg is initially at rest. One end is attached to the spring with spring constant k = 420 N/m. The spring is compressed by 0.50 m and let go. The box starts oscillating (moving back and forth) as a result. Assume there is no friction. (a) What is the amplitude of this motion ? (b) At what point is the spring potential energy maximized and what is the magnitude ? (c) At what point is the kinetic energy maximized and what is the magnitude of it ? (d) What is the maximum velocity of the box throughout this repetitive motion ? (e) At what point is the acceleration of this box maximized and why so ? (f) At what point is the velocity of the box zero and why so