Question

question 7 of 10 which of the following describes an action - reaction pair? a. you kick a wall, and the wall pulls on your foot. b. a television pushes down on a shelf, and the shelf pulls the television down. c. a bed sits on the floor, and earths gravity pulls down on the bed. d. the moon pulls on earth, and earth pulls back on the moon.

Explanation:

According to Newton's third - law of motion, for every action, there is an equal and opposite reaction. An action - reaction pair involves two forces that act on two different objects and are equal in magnitude and opposite in direction. In option D, the Moon exerts a gravitational force on Earth (action), and Earth exerts an equal and opposite gravitational force on the Moon (reaction). In option A, a kick is a push, not a pull. In option B, both forces are in the same downward direction. In option C, the two forces are not an action - reaction pair as one is a contact force between the bed and the floor and the other is the gravitational force.

Answer:

D. The Moon pulls on Earth, and Earth pulls back on the Moon.