Force and Pressure-what i learnt

1. New node

2. Forces

3. To reduce friction, we can use lubricants.

4. Gravitational force

5. Magnetic Force

6. Used in refrigerators, dumpsters and telephones

7. Pressure

8. Amount of force applied per unit area

9. Depends on force and area

10. Reducing area can increase pressure eg: using sharp knives to cut apples

11. Increasing area can reduce pressure eg: camels have large feet so they do not sink into the ground

12. New node

13. Pressure= Force/ Area

14. A force involves a push and pull.

15. Force can change the direction, the shape and the speed of an object

16. F=ma

17. Without frictional force, we would not be able to hold anything without it slipping.

18. Too much friction may cause machines to work unneccessarily

19. Without gravitational force, everything would be floating around

20. Frictional force

21. Gravitational force causes things to fall