29. A 56 kg diver runs and dives from the edge of a cliff into the water which is located 4.0 m below. If she is moving at 8.0 m/s the instant she leaves the cliff, determine the speed at which she enters the water. (4 marks) 30. A student lifts her 2.0 kg Physics binder vertically 45 cm at a constant velocity. Calculate the work done during the lift. (3 marks)