1. Review of Force Unit

2. Draw a picture to solve this problem
A box is being pushed by two stellar science students, one on each side of the box. Dalton is pushing the box with a force of 10N to the left. Kylee is pushing the box with a force of 15N to the right. Who is the stronger individual? What is the net force? In what direction is the box moving?

4. Draw a picture to solve this problem
During tug of war Janelle felt she was a supergirl and attempted to beat Jack. Janelle with one hand on the rope and the other at her side applied a 100N force to the left, while Jack applied a 100N force with both hands to the right. What is the net force and direction on the rope?

6. Draw a picture to solve this problem
Janelle finally decided to take this seriously and put both hands on the rope and applied a 150N force to the left, while Jack still struggled with his 100N force to the right. What is the net force and direction of motion for the rope?

8. Friction What are some ways you can reduce friction?
Using lubricants, like oil in a car engine
Do you want to completely eliminate friction? Why?
No, it would be difficult to even walk without friction between feet and the ground
Friction depends on the types of ____surfaces_____ involved and how __hard_ the surfaces push together.

9. Name the type of friction

10. Name the type of friction

11. Name the type of friction

12. Name the type of friction

13. Name the type of friction

14. Name the type of friction

15. Name the type of friction

16. Name the type of friction

17. Name the type of friction

18. Name the type of friction

19. Name the type of friction

20. What force is the following example of?
Centripetal force

21. What force is the following example of?
inertia

22. What force are the following examples of?
Centripetal force

23. The picture below shows air resistance, what type of friction is this?

24. Name the law

25. Name the law

26. Name the law

27. Name the law

28. Name the law

29. Name the law

30. Name the law

31. Name the law

32. Name the law

33. What unit is used for weight?
Newton, because it is a force

34. How can you increase acceleration?
Increase the force
Decrease the mass

35. How can you increase the momentum of an object?
By increasing the mass
By increasing the velocity
Or you can increase both

36. Momentum of an object is in the same direction as its ___________.
velocity