A student drops a 6.8 kg bowling ball onto a trampoline and allows the bowling time. The graph shows the vertical velocity of the bowling ball as a function of time, where upward velocity is considered positive. (a) How can this graph be used to determine the acceleration of gravity? For parts (b) and (c), full credit will be awarded only responses that show equations, calculations, and verbal to explanations for how quantities were found from the data. (b) What is the ball's change in momentum as a result of being in contact with the trampoline? (c) What average force is applied to the ball while it is in contact with the trampoline?