Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

C. The person's feet push backward on the sidewalk; the sidewalk pushes forward on the person.

This is due to our kick back motion forced on the sidewalk when we walk, and the resistance of us walking on it createsa push forward.

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C. The person's feet push backward on the sidewalk; the sidewalk pushes forward on the person.

Explanation:

Newton's third law states that for every action, there is equal and opposite reaction. It is also known as action-reaction principle. A person is able to walk on sidewalk by pushing the sidewalk backwards. Then, the sidewalk pushes the person's feet forward.

Action: The person's feet push backward on the sidewalk.

Reaction: The sidewalk pushes forward on the person.

trig 15.3 cos

d. air pressure decreases as altitude increases.