When you push something, the weight of that object can change how fast it moves.

If the weight goes up but the strength of your push stays the same, the object will not speed up as quickly.

This idea comes from Newton's second law of motion, which says:

Force = Mass x Acceleration

Here’s what the words mean:

• Force is how hard you are pushing.
• Mass is how heavy the object is.
• Acceleration is how fast the object speeds up.

Example:

Think about pushing two shopping carts.

1. Empty cart: This one is light. You can push it easily, and it moves fast.
2. Full cart: This cart is heavy because it has things in it. When you push it with the same strength, it doesn’t speed up as much.

So, when you make something heavier and you don’t change how hard you push, it will go slower.