Question

a skater pushes backwards on the ground with their foot. what is the correct reaction force for this action?
a) the ground pushes forward on the skaters foot
b) the ground pushes upwards on the skaters foot
c) the ground pushes upwards on the skateboard
d) the ground pushes forwards on the skateboard.

Explanation:

According to Newton's third - law, for every action, there is an equal and opposite reaction. When the skater pushes backwards on the ground with their foot, the ground exerts a reaction force on the skater's foot in the opposite direction (forward).

Answer:

A. The ground pushes forward on the skater's foot