1. Forces

2. Force = a push or pull on an object measured in Newtons (N)

3. A push or a pull on an object involves direction so force is a vector

4. Arrows are used to represent vectors.
They show the direction of the force.

5. The size of the arrow represent the size of the force.
small arrow = small force
large arrow = large force

6. Add force vectors to the pictures below.

7. Numbers can be used to assign a specific amount to a force.
The unit used is Newtons (N).

8. The combination of all the forces on an object is the net force.

9. If you have opposite forces you subtract to get the net force.
50 N to the left
or -50 N

10. If you have forces in the same direction you add to get the net force.

11. If you have forces in the same direction you add to get the net force.
300 N to the right
or N

12. Forces can be used to predict direction of movement.
The direction of the net force is the direction of the movement.

13. Add force vectors to the pictures below and include 50 N for each person

14. What is the net force for each diagram?

15. What is the direction of movement for each diagram?

16. What type of movement is the result of a net force of 0?
no movement

17. Balanced forces – the forces on an object are equal and opposite
= no movement

18. Unbalanced forces – the forces on an object are opposite but not equal
= movement towards the larger force