Ahard rubber ball, released at chest height, falls to the pavement and bounces back to nearly the same height. when it is in contact with the pavement, the lower side of the ball is temporarily flattened. suppose the maximum depth of the dent is on the order of 1 cm. find the order of magnitude of the maximum acceleration of the ball while it is in contact with the pavement. state your assumptions, the quantities you estimate, and the values you estimate for them. explain!