When a person bends an arm a different muscle is used to bring it back to the original position. why can't the same muscle be used to both bend and unbend the arm?

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asked Mar 7, 2018 50.1k views

5 votes

When a person bends an arm a different muscle is used to bring it back to the original position. why can't the same muscle be used to both bend and unbend the arm?

Physics
high-school

Onassar asked

by Onassar

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1 Answer

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Muscles can only pull not push

Afacat answered Mar 10, 2018

by Afacat

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