Newton's Third Law
The answer lies in Newton's Third Law of Motion: For every action, there is an equal and opposite reaction.
* Action: The Earth exerts a gravitational force on the car, pulling it towards the ground.
* Reaction: The car exerts an equal and opposite gravitational force on the Earth.
Equal in Magnitude, Opposite in Direction
This means the force exerted by the Earth on the car and the force exerted by the car on the Earth are *exactly the same size*.
Why Doesn't the Earth Move?
You might be thinking, "If the forces are equal, shouldn't the Earth move too?" Here's why it doesn't seem that way:
* Mass Matters: The Earth has a *vastly* larger mass than a car. The same force acting on a much larger mass results in a much smaller acceleration. The Earth's acceleration is so tiny that it's practically impossible to notice.
* Reference Frame: We experience the Earth as stationary because we are standing on it, and it's our frame of reference.
In Summary
While the forces are equal in magnitude, the effects are different due to the massive difference in mass between the Earth and the car. The car accelerates noticeably due to Earth's gravity, while the Earth's acceleration is practically negligible.
