Here's why:
* Force is a vector quantity: This means it has both magnitude (how strong it is) and direction.
* Adding vectors in the same direction: When vectors point in the same direction, we simply add their magnitudes.
Example:
Imagine you're pushing a box with a force of 10 Newtons to the right. Your friend joins you and pushes with a force of 5 Newtons to the right. The total force acting on the box is 15 Newtons to the right.
Think of it like this: If you have two people pushing a car in the same direction, their combined effort will make it move faster than if only one person pushed.
