Gravity... Inertia... Centripetal force
Gravity is the force that keeps us “attached” to the Earth.
Force is a push or pull. Gravity is the force that pulls us down and keeps us on the ground. Centripetal force makes objects move in a circle. Inertia is what makes an object keep moving or stay still unless a force acts on it. Heavier objects have more inertia and therefore need more force to move or stop. An object balances over its center of gravity.