A man is holding a 19-kg child using both hands with his elbows bent in a...
A man is holding a 19-kg child using both hands with his elbows bent in a 90∘ angle. The biceps muscle provides the positive torque he needs to support the child. Determine the force that each of his biceps muscles must exert on the forearm in order to hold the child safely in this position. Ignore the triceps muscle and the mass of the arm. Let the child be l = 0.35 m from the elbow joint, and the biceps be d = 0.050 m from the joint.
Homework Answers
m
= 19 kg
l = 0.35 m
d = 0.05 m
the torque on the child is
F mg
the force on the biceps is
the force on the each biceps is
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