Physics 10 Mechanics

1. My teacher calls himself
3. the force which opposes motion when one surface moves over another. it is caused by the roughness of the surfaces
6. upward force on a body which is immersed in a flud (liquid or gas)
8. the rate of change of velocity with time a vector, units m/s/s
11. the property of matter which makes it resist acceleration
12. a force produced in a body. the opposite is compression
14. collisions the total ke is decreased ; perfectly inelastic if they stick together
16. the force of gravity on a body
17. the rate of doing work. watts
18. the ability to do work
20. upward force on the wing of an aircraft due to the air flowing around it
21. and distance the scalar versions of velocity and displacement

1. energy energy an object has as a result of its motion
2. the distance traveled in a particular direction from a specified origin
4. the value of a quantity measured at an instant in time, as opposed to an average quantity measured over a period of time
5. is done when a force moves an object in the direction of force. scalar
7. the rate of change of displacement with time. a vector, units m/s
9. fraction of energy which is usefully transferred
10. an unbalanced force causes an acceleration
13. one newton is the force which will accelerate
15. change in momentum. a vector
19. reaction two objects contact each other exert a force on each other which is perpendicular to the surface