(b) Calculate the kinetic energy of a 10 g bullet travelling at a velocity of 2500 km/h. (3) (c) Atoyrocket of mass 5 kg is launched upwards with sufficient speed to reach a maximum height of 25 m. (i) Calculate the launch speed of the toy rocket. (ii) Calculate the momentum of the toy rocket at a height of 20 m. (iii) 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. ( 10 ) (d) Calculate the power required to raise a 20 kg object to a height of 10 m in 1 minute. What assumptions, if any, do you need to make to solve this problem? (4)