Question

1. 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?
2. A steel cable with a total length of 100 m and a mass of 1000 kg is connected to two poles. The tension in the cable is 500 N, and the wind makes the cable vibrate with a frequency of 2 Hz. Calculate the wavelength of the resulting wave on the cable.

Answer 1

To1. PE = mgh

PE potential energy
m mass
g 9.81
h height

P = PE / t

P power
t time