Part A You exert a quick push on a 20-g ice cube horizontally along the top of a smooth incline so that it starts moving at a speed of 0.80 m/s, as shown in (Figure 1). After you Calculate the speed of the ice cube when it reaches the bottom of the incline. stop pushing it, the cube slides down the incline as shown in the figure. Express your answer with the appropriate units. HA ? of = Value Units Submit Previous Answers Request Answer Figure Provide Feedback 1 of 1 v = 0.80 m/s 20 cm 30 cm -30 cmThe fastest time for the Sears Tower (now Willis v Part A Tower) stair climb (103 flights, or 2232 steps) is about ~/ 13 min. Estimate the mechanical power for a top climber. Assume the mass of climber is 80 kg and the heigth of the step is 0.18 111. Express your answer with the appropriate units. P= 400W Previous Answers v Correct V PartB if the body is 20% efficient at converting chemical energy into mechanical energy, how many joules of chemical energy does the body expend during the stair climb? Express your answer in ioules