Force (F) = Mass (m) x Acceleration (a)
This means:
* More mass, more force: If you apply the same force to a heavier object and a lighter object, the heavier object will accelerate less.
* More acceleration, more force: If you apply a stronger force to an object, it will accelerate more.
Example:
Imagine pushing a shopping cart. If you push it gently (small force), it will accelerate slowly. If you push it with more force, it will accelerate faster. Also, if you push a cart full of groceries (more mass), it will accelerate less than if you push an empty cart (less mass) with the same force.