It takes 120 minutes for a man to ride his bicycle up the road to alpe d'huez in france. the vertical height of the climb is 1,120 m, and the combined mass of the rider and bicycle is 96 kg. what is the bicyclist's average power output, in w?

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?