Forces

4. When two forces working in opposite directions are not the same strength. (10,6)
6. Unbalanced forces cause objects to change speed or ...... (9)
8. The unit of force. (6)
10. A force that can affect something from a distance (e.g. gravity). (3-7,5)
11. How fast something is moving. Often measured in metres per second (m/s). (5)
13. Not moving. (10)
15. A force that pushes things up. (8)

1. A force that tries to slow things down when two things rub against each other. (8)
2. When two forces are the same strength, but working in opposite directions. (8,6)
3. A push or a pull. (5)
5. The relationship between the extension of a spring and the force applied to it (8,12)
7. The amount of force with which gravity pulls, measured in newtons (6)
9. Piece of equipment containing a spring, used to measure forces. (6,5)
12. A force that needs to touch an object before it can affect it (e.g. friction). (7,5)
14. The amount of matter that something is made of. (4)