5. Consider the following two energy conversion questions:

a) A rollercoaster car is at the top of a 20 ft hill moving at 3 ft/s. What is its velocity when

it reaches the bottom of the hill in ft/s? Ignore friction and air resistance.

b) A 10 ft tall water storage tank is pressurized to 10 psig when a valve at the base of the

tank is opened. What is the velocity of the water exiting the tank in ft/s?