6. look at the picture: Perpendiculardistance Line of action of force moment (newton metre, Nm) = force (newton, N)× perpendicular distance (metre, m)
7. Worked Examples Question 1 A wheel nut is tightened to a moment of 100 Nm. A motorist has to undo the nut with a wheel wrench which is 0.40 m long. What force must he apply? Answer Question 2 How can the force applied be reduced?Answer
8.
9. Therefore… Principle of Moments: If the clockwise moment = anticlockwise moment, the system is in equilibrium
12. Centre of Mass In Physics we find it a lot easier to think of objects as point masses. All objects have a point at which they balance, called the centre of mass. We think of all the mass as being concentrated at the centre of mass.
15. You should have gotten an idea about how you are going to Structure your catapult by now… Use these concepts to your advantage. We are going to learn about momentum next and this would help you with the concepts on firing your projectile
20. Use this equation to determine How you are going to fire your projectiles!!! The momentum equation can help us to think about how a change in one of the two variables might affect the momentum of an object.
21. Now get to work!!! Your Survival Depends On It!!!
