As one gear turns, the other gear must also turn. Where the gears meet, the teeth must both move in the same direction. In the diagram, the teeth of both gears move upwards. This means that the gears ...

Learn how to calculate the universal gravitational force between two objects! This video explains Newton’s Law of Gravitation, walking you through the formula, units, and a step-by-step example to ...

The principle of moments states that: When an object is balanced, the sum of the clockwise moments about any point equals the sum of the anticlockwise moments about the same point. Some examples of ...