A 50.8 kg child slides down a water slide with a velocity of 0.9 m/sec at the top. At the bottom of the slide, she is moving horizontally, y=2.5 meters above the water. She splashes into the water d=3 meters to the left of the bottom of the slide. a) Assuming potential energy to be zero at the water level, what is the mechanical energy of the child at the top of the slide? For this, ME=PE+KE. Since PE=0, ME=0+KE. So ME=0.5 (50.8) (0.9^2), but thats not right. b) How high is the top of the slide above the bottom of the slide? I dont know how to do this one.