Two identical balls, A and B, are released from rest from the same height, 2.8 m, along two smooth inclined planes that touch the horizontal ground. Ball A is released on a plane inclined at 300 to the horizontal. The plane on which ball B is released is inclined at 600 to the horizontal. Ignore energy due to rotation of the balls. [Diagrams, but no forces]
a) What is the speed of each ball at the bottom of their respective inclined planes?
b) Which ball would reach the bottom first? Explain your answer.