1. Distinguish between kinetic energy and gravitational potential energy, using your own words and understanding. 2. A toy rocket of mass 5 kg is launched upwards with sufficient speed to reach a maximum height of 25 m. (a) Calculate the launch speed of the toy rocket. (b) Calculate the momentum of the toy rocket at a height of 20 m. (c) Sketch a graph to show the variation of the kinetic energy of the toy rocket with height from the time the rocket was launch until it reached maximum height