P6 Forces

1. Friction causes ____ and tear.
4. When spring is stretched, its increase in length is called ____.
5. Type of ____ affects the amount of frictional force between two surfaces.
8. Friction ____ motion.
11. A force is not ____ and cannot be seen.
12. Forces can change the ____ of a moving object.
13. ____ measures the amount of gravitational force that is acting on an object.
14. Friction can be reduced by using ____.

2. When like poles of magnets are facing each other, they exert a force of ____.
3. ____ forces are forces that require physical contact.
6. ____ is a push or a pull.
7. Gravity is the force that pulls all objects ____ downwards towards the centre of the Earth.
9. Friction prevents ____ of vehicles.
10. Elastic ____ force causes elastic materials or objects to return to their original shape after the force is removed.
11. The greater the ____ of the object, the greater the gravitational force acting on it.