58. A ball with a mass of 0.5 kg is uniformly accelerated from rest at a rate of 1.7 m/s. What is the kinetic energy of the ball after it has accelerated a distance of 12 metres? 35. Shown below is a lever arm safety valve. If the relief pressure desired is 100 kPa, what mass W, in kilograms, must be attached to the lever end? The distance A - B is 0.45 metres and A - C is 10 cm. The valve disc area on which the pressure is applied is 19.635 cm. The mass of the lever arm and the valve disc is not considered for this example. w 36. Shown below is a lever arm safety valve. If a force of 700 N, at "C", is required to keep the valve shut, what mass "W" must be attached to the lever end? The distance A - B is 0.5 metres and A - C is 13.5 cm. The mass of the lever arm and the valve disc is not considered for this example. 57. How much potential energy is transformed into kinetic energy if a ball with a mass of 0.24 kg is drops from a height of 2.33 m to a height of 0.667 metres?