A soft tennis ball is dropped onto a hard floor from a height of 1.55 m and rebounds to a height of 1.17 m. (Assume that the positive direction is upward.) (a) Calculate its velocity just before it strikes the floor. 5.5112 J m/s (b) Calculate its velocity just after it leaves the floor on its way back up. 4.789 y m/s (c) Calculate its acceleration during contact with the floor if that contact lasts 3.50 ms. 2943.14 y m/s2 (cl) How much did the ball compress during its collision with the floor, assuming the floor is absolutely rigid? 0.2528 X m