Answer: Yes, of course.
Explanation:
If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
That is Newton's Third Law.
Suppose Mr. Monkey is swinging on the vine. When he grabs it and jumps off the ledge, the vine-monkey duo swings down toward the ground because of gravity.
Suppose Mr. Monkey is hanging upside down. His feet are holding onto the branch that is supporting him, therefore an upward force. But gravity also acts on Mr. Monkey, so he is also getting pulled down to the Earth.
Therefore, yes. Newton's Third Law always applies to monkeys, especially poor Mr. Monkey.
I hope this helped :)
BB76
