PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A 60kg athlete runs up stairs that rise vertically 5m in 6s. Only 20% of the chemical energy released in the body is converted into useful mechanical work.
(i) Calculate the mechanical work done.
(ii) Determine the average mechanical power output.
(iii) Estimate the total chemical energy consumed during the climb (take g=9.8m/s2).