1. Forces Physical science Unit 2

2. Isaac Newton In 1665 schools and businesses closed for the bubonic plague Newton saw and apple fall from a tree Wondered why it fell

3. Newton proved it was the force of gravity that caused the apple to fall And it was the same force that kept the planets in orbit

4. What is force? Force is a push or a pull

5. A force gives energy to an object Causing that object to: Start moving Stop moving Or change direction

6. Combining Forces Forces are Vectors. What does that mean? When forces act in the same direction they add together

7. Forces in the opposite direction combine by subtraction What if you had two forces of the same size in opposite directions? Balanced forces cause No Motion!!!

8. When forces are unbalanced you have motion