When you kick a soccer ball, you apply a force f1 to the ball. what force f2 does the soccer ball exert on your foot? 1. there is no force f2. 2. f1 = f2, acting in the same direction 3. f1 = f2, acting in opposite directions 4. f2 < f1 5. f1 < f2?
Explanation: Newton's 3rd law states that for every applied force, there is an equal and opposite reaction force. Therefore the ball exerts a force equal to f1, but in the opposite direction.