Use the following information to calculate the speed of a ball in a pinball machine at a specific location. The ball is launched by using a spring (k = 684 N/m) compressed by 7.8 cm. Consider the starting position of the ball to be its location when the spring is compressed. How fast would the 59.5 gram ball be moving at a location which is 28.8 cm higher than the starting position? Assume that the ball slides freely--no rolling.