Scalars, Vectors and Force Basics
Think of scalars as simple measurements with just size - like your mass (70kg) or temperature (20°C). Vectors are more complex because they need both size and direction, like velocity (30 m/s north) or force.
Here's the key difference: speed is scalar (just "how fast"), but velocity is vector ("how fast and in which direction"). Same goes for distance (scalar) versus displacement (vector with direction).
Forces are basically pushes or pulls that can change an object's shape, speed, or direction. You've got contact forces (like friction when you slide down a slope) and non-contact forces (like gravity pulling you down even when you're jumping).
Quick Tip: Remember that force is measured in newtons (N), where 1kN = 1,000N and 1MN = 1,000,000N.
