What Are Forces and How Do We Measure Them?
Forces are simply pushes or pulls that act on objects when they interact with other things. Think about kicking a football - your foot applies a force to make the ball move. Every force is measured in newtons (N), named after the famous scientist Sir Isaac Newton.
Forces come in two main types: contact forces (where objects touch) and non-contact forces (where objects don't need to touch). This distinction helps us understand how different forces work in the real world.
Forces are vector quantities, which means they have both size (magnitude) and direction. This is different from scalar quantities that only have size. When drawing forces, we use arrows - longer arrows show stronger forces, and the arrow points in the direction the force acts.
Quick Tip: Remember that force diagrams use arrows where 1mm might represent 1N, making it easy to compare different forces visually!
