For every force applied, there is a reaction force of equal magnitude and acting in the opposite direction.
i. The normal force of equal magnitude as the force applied on the wall acts on the person. Static friction on the person's feet allows him to maintain the push. The ground exerts a normal force that supports him vertically.
Consider the following two situations:
A) A person pushes on a wall without moving.
B) A person runs and accelerates.
For each case, answer the following questions:
i. Identify the relevant forces acting on the person
ii. Does Newton’s Third Law apply? If it applies, what are the 3rd law pairs?
iii. Why is/isn't the person accelerating?
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