Physics 10 Mechanics

1. upward force on the wing of an aircraft due to the air flowing around it
4. reaction two objects contact each other exert a force on each other which is perpendicular to the surface
5. an unbalanced force causes an acceleration
7. fraction of energy which is usefully transferred
8. upward force on a body which is immersed in a flud (liquid or gas)
10. is done when a force moves an object in the direction of force. scalar
12. the rate of change of velocity with time a vector, units m/s/s
15. the property of matter which makes it resist acceleration
16. a force produced in a body. the opposite is compression
17. the rate of doing work. watts
19. collisions the total ke is decreased ; perfectly inelastic if they stick together
20. one newton is the force which will accelerate
22. and distance the scalar versions of velocity and displacement

2. change in momentum. a vector
3. the ability to do work
6. the distance traveled in a particular direction from a specified origin
9. the force which opposes motion when one surface moves over another. it is caused by the roughness of the surfaces
11. the value of a quantity measured at an instant in time, as opposed to an average quantity measured over a period of time
13. the rate of change of displacement with time. a vector, units m/s
14. energy energy an object has as a result of its motion
18. My teacher calls himself
21. the force of gravity on a body