When you lift an object by moving only your forearm, the main lifting muscle in
ID: 1348811 • Letter: W
Question
When you lift an object by moving only your forearm, the main lifting muscle in your arm is the biceps. Suppose the mass of a forearm is 1.20 kg . If the biceps is connected to the forearm a distance ^biceps = 3.50 cm from the elbow, how much force d biceps must the biceps exert to hold a 500 g ball at the end of the forearm at distance d ball = 32.0 cm from the elbow, with the forearm parallel to the floor? How much force F elbow must the elbow exert? What is the horizontal distance forearm between the elbow and the point where the weight of the forearm acts? Express your answer in meters.Explanation / Answer
"the horizontal distance d of forearm between the elbow and the point where the weight of the forearm acts
d = L/2 = 32/2 = 16 cm = 0.160 m