1. Thigh-Pagorus Learning Objective: To build together knowledge of centre of gravity with forces The big questions: -Where is SOH CAH TOA used in Physics/Life -What is pythagorus’s theorum -How can you resolve forces

2. SOH CAH TOAAAAA Learning Objective: Link trigonometry to force diagrams The big questions: -Can you draw a force diagram for any object -Can you use soh cah toa -Are you able to link soh cah toa to forces at an angle?

3. We use this to calculate the amount of forces acting in each direction http://www.youtube.com/watch?v=7eis20rBwz 8 We can resolve the force into 2 directions:

4. Thigh-Pagorus Learning Objective: To build together knowledge of centre of gravity with forces The big questions: -Where is SOH CAH TOA used in Physics/Life -What is pythagorus’s theorum -How can you resolve forces

5. Spotlight time… 2 minutes to answer the question, then one is chosen to present your work and everybody else votes if they were doing it correctly Q: A man is pulled out of a window by a force. The amount that is horizontal is 10 N and the angle is 50 degrees to the horizontal. What is the strength of the whole force

6. Thigh-Pagorus Learning Objective: To build together knowledge of centre of gravity with forces The big questions: -Where is SOH CAH TOA used in Physics/Life -What is pythagorus’s theorum -How can you resolve forces

7. Work out horizontal AND vertical force for E) 20 N 40˚ 40 N 15˚

8. Questions from past papers: Jan ‘10 q5, q16, Jan ‘11 q4, q16 (on board) What angle and force are created if a football is kicked by two players at once: One player kicking it left with 40N and one kicking up with 20N? EXT: What if one kicked it left with 40N and one kicked it right with 30N?

9. Pythagorus’s theorum H A O