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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Ответ:
Muscles can only pull not push
Explanation:
Verified correct with test results.
Ответ:
B. 3m/s
Why?
F=ma So F=(15)(8)
Make F=120
Now you just plug it in
120=40a
Your goal is to get the “a” by itself so you divide both side by 40 and you will get a=3