Energy Sources For Muscular Contraction Worksheet (Page 2 of 3) in pdf

Energy Sources For Muscular Contraction Worksheet Page 2

Exercise #1. Consider a person using a step-stool at a steady rate of speed (m/s). The

force required is the lifting of the person’s boy weight which is F = mg, and the work

required is the force times the vertical distance, d, the mass is moved, W = F x d = mgd.

The power required is the rate at which the work is done or P = W/t. You should assume

25% efficiency for the conversion of energy produced in the body to mechanical work

done by the body.

1a. Using the power/kg from oxidation and the energy per gram from glycolysis, write an

equation for the rate (meters/sec) at which a person of body mass M can use the step-

stool if she is developing lactic acid at the rate of m grams per second. You should get an

equation of a straight line, ie: y = ax + b. Remember 1 calorie = 4.186 Joules, g = 9.8

m/s

Energy Sources For Muscular Contraction Worksheet Page 2