A weightlifter is holding a 50.0-lb weight (equivalent to 222.4 N) with his forearm, as shown in (Figure). His forearm is positioned at β=60° with respect to his upper arm. The forearm is supported by a contraction force of the biceps muscle(T), which causes a moment around the elbow. Assuming that the contraction force(T) in the biceps acts along the vertical direction given by gravity, what contraction force (T) must the muscle exert to hold the forearm at the position shown? What are the reaction forces on the elbow joint? Assume that the forearm’s weight is negligible.
A weightlifter is holding a 50.0-lb weight (equivalent to 222.4 N) with his forearm, as shown in (Figure). His forearm is positioned at β=60° with respect to his upper arm. The forearm is supported by a contraction force of the biceps muscle(T), which causes a moment around the elbow. Assuming that the contraction force(T) in the biceps acts along the vertical direction given by gravity, what contraction force (T) must the muscle exert to hold the forearm at the position shown? What are the reaction forces on the elbow joint? Assume that the forearm’s weight is negligible.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A weightlifter is holding a 50.0-lb weight (equivalent to 222.4 N) with his forearm, as shown in (Figure). His forearm is positioned at β=60° with respect to his upper arm. The forearm is supported by a contraction force of the biceps muscle(T), which causes a moment around the elbow. Assuming that the contraction force(T) in the biceps acts along the vertical direction given by gravity, what contraction force (T) must the muscle exert to hold the forearm at the position shown? What are the reaction forces on the elbow joint? Assume that the forearm’s weight is negligible.
Transcribed Image Text:60°
50 lb
13.0 in.
1.5 in.
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