From a height of 4 m, a hollow sphere with a radius of 12 cm and a mass of 650 g rolls along an inclined trough (45 ° to the horizon). The system is located on Earth. [1] Find the potential [2] and [3] the kinetic energy at t0 just before the start of rolling and at the end of the slope of t1. [4] Find the momentum at the end of the road. [5] How would the momentum at the end of the slope change if the sphere slipped? Assume that the sphere is rolling in a V-shape slope/track (track sides are at right angle) . The image shows cross section of the sphere in the track.