E
electro man
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1. A skier coasts down a very smooth , 10-m-high slope . If the speed of the skier on the top of the slope is 5.0m/s , what is the speed at the bottom of the slope ?
2. A 60-kg woman runs a staircase 15m high (vertically) in 20 s. (a) How much power does she expend? (b) What is her horsepower rating ?
2. A 60-kg woman runs a staircase 15m high (vertically) in 20 s. (a) How much power does she expend? (b) What is her horsepower rating ?