Mechanics

3. energy an object has as a result of its motion
6. when two variables are related, one of the variable is free to roam so it is called the
7. the distance travelled in a particular direction from a specified origin
9. an unbalanced force causes an acceleration
11. fraction of energy which is usefully transferred
14. the twisting force that tends to cause rotation
15. one newton is the force which will accelerate
17. the force which opposes motion when one surface moves over another. it is caused by the roughness of the surfaces
18. the rate of change of velocity with time a vector, units m/s/s
19. upward force on the wing of an aircraft due to the air flowing around it

1. what is done when a force moves an object in the direction of force. scalar
2. a body continues to maintain its state of rest or of uniform motion in a straight line unless acted upon by an external unbalanced force
4. change in momentum. a vector
5. the rate of change of displacement with time. a vector, units m/s
8. the rate of doing work. watts
10. one of the undefined qualities of physics, it measures the separation of two points.
12. the ability to do work
13. the force of gravity on a body
14. a force produced in a body. the opposite is compression
16. refers to the quantity of motion that an object has