5. Andy, who has a mass of 80 kg, is performing calf raises with just his bodyweight. During the rising part of the calf raise, his center of mass is displaced 0.1 m. What is the work done by Andy's calf muscles during the rising part of the a. calf raise? b. If Andy does the rising part in 0.5 seconds, how much power is produced by his calf muscles? c. What kind of contraction (concentric, eccentric, isometric) is occurring in Andy's calf muscles? Why?

5. Andy, who has a mass of 80 kg, is performing calf raises with just his bodyweight. During the rising part of the calf raise, his center of mass is displaced 0.1 m. What is the work done by Andy's calf muscles during the rising part of the a. calf raise? b. If Andy does the rising part in 0.5 seconds, how much power is produced by his calf muscles? c. What kind of contraction (concentric, eccentric, isometric) is occurring in Andy's calf muscles? Why?