Mechanics

3. refers to the quantity of motion that an object has
5. the rate of doing work. watts
8. change in momentum. a vector
10. one of the undefined qualities of physics, it measures the separation of two points.
11. the rate of change of displacement with time. a vector, units m/s
12. a force produced in a body. the opposite is compression
13. fraction of energy which is usefully transferred
15. 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
18. the ability to do work
19. the force which opposes motion when one surface moves over another. it is caused by the roughness of the surfaces
20. an unbalanced force causes an acceleration

1. the twisting force that tends to cause rotation
2. when two variables are related, one of the variable is free to roam so it is called the
4. what is done when a force moves an object in the direction of force. scalar
6. the distance travelled in a particular direction from a specified origin
7. one newton is the force which will accelerate
9. the rate of change of velocity with time a vector, units m/s/s
14. energy an object has as a result of its motion
16. the force of gravity on a body
17. upward force on the wing of an aircraft due to the air flowing around it