Here's a breakdown:

* Force: A push or pull that can cause a change in motion of an object. It's measured in Newtons (N).

* Mass: The amount of matter in an object. It's measured in kilograms (kg).

Newton's Second Law of Motion describes the relationship between force, mass, and acceleration:

* Force (N) = Mass (kg) x Acceleration (m/s²)

This means:

* A larger force is needed to accelerate a heavier object.

* A larger force produces a greater acceleration for a given mass.

Example:

Imagine you're pulling a wagon. The force you exert on the wagon's handle is the pull. If the wagon is heavy (high mass), you'll need to apply more force to get it moving (accelerating) compared to a lighter wagon.