In each situation described below, compare the magnitudes of the two forces Expl

Question

In each situation described below, compare the magnitudes of the two forces Explain your answer in each case. A 90kg man and a 60 kg boy each hand extended out in front and are pushing on each other Neither is moving Compare the force exerted by the man's hand to that exerted by the boy's hand on the man's. In (a) the boy begins to slide along the floor Now compare the same two forces between their hands c A person is leaning against a wall with her hand straight out pushing against the wall Describe two forces in this situation which are equal in magnitude opposite in direction that do NOT make up a third-law force pair.

Explanation / Answer

The force of the man on the boy and the force of the boy on the man are equal in magnitude and opposite in direction

part b )

SAME FORCE. However, since the boy has less inertia (mass), he accelerates more than the heavier man

part c )

since the normal force from the wall adjusts to match whatever force the person pushes with, while the person has control over how hard they pus

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