A spring with spring constant 15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is
then pulled down 7.5 cm and released. The ball makes 31 oscillations in 15 s seconds. 1) What is its the mass of the ball?
Express your answer using two significant figures.
m = _____ g
2) What is its maximum speed?
Express your answer using two significant figures.