Answer: (d) F1 and F2 are equal
Newton’s third law of motion states that when one body exerts a force on the other body, the first body experiences a force that is equal in magnitude in the opposite direction of the force which is exerted.
- F1 and F2 are equal because Newton’s third law of motion is obeyed by Newton’s law of gravity. When one object exerts a force on another, the second object responds by exerting an equal and opposite force on the first.
- An apple falling down has the force of gravity acting downward (F1) which is the action. The opposite reaction is the force the apple exerts on the earth (F2).