A 1 kg mass hangs from a spring secured to a rigid beam with a spring constant 50 N/m. The vertical axis is labelled x. The top of the spring is defined as x = 0. While at rest, the mass causes the spring to extend by an amount Ax. Assuming normal gravity, find Ax in meters. The mass is pulled down from this position by 5 m. Calculate the potential energy stored in the spring in J. The mass is released and accelerates upwards, calculate the maximum velocity. This maximum velocity will be reached when the mass is at position: a. Xo-the original length of the spring with no mass attached. b. Xo + Ax c. Xo-Ax d. Xo + 5m