Question

Robert has a body mass of 68 Kg and is interested in performing one-arm preacher curls with a dumbbell. His forearm is 0.35 m long.

a) What is the weight of his forearm?

b) How far away (in meters) is Robert’s forearm’s center of mass from his elbow?

c) How much torque does the weight of Robert’s forearm cause at the elbow during the preacher curl when the forearm is angled 10° above the horizontal?

Answer 1