Force

6. the unit for work
9. the work that you do on a machine
10. the upward force exerted by fluids
11. force times distance
15. when a force is exerted, there is an equal but opposite reaction force
16. when fixed and movable pulleys are used together
17. forces in opposite directions are ___ to get the net force
18. the unit for power
19. the force of attraction between objects that is due to their masses
20. lever where the input force is between the fulcrum and the load
23. if gravity is pulling an object down and there are no other forces acting on it
25. the constant velocity when the force of resistance is equal in magnitude and opposite in direction as the force of gravity
28. the friction between moving surfaces
29. the combination of all of the forces on an object
30. machines that are made of two or more simple machines
33. an inclined plane wrapped around a cylinder
35. pulley that is attached to something that does not move
36. lever where the fulcrum is between the input force and the load
38. the force that you apply to a machine
39. forces in the same direction are ___ to get the net force
40. a device that makes work easier by changing the size and direction of a force
42. simple machine consisting of two circular objects of different sizes
43. calculated by acceleration due to gravity times time (for falling objects)
44. pulley that is attached to the object being moved

1. property that is measured in Newtons
2. lever where the load is between the fulcrum and the input force
3. mass divided by volume
4. describes balanced forces acting on objects
5. another name for Newton's First Law of Motion
7. the work done by the machine
8. when the weight is equal to the buoyant force
12. the unit of force
13. the more of this, the harder it is to stop the object or change its direction
14. when the weight is greater than the buoyant force
16. the type of forces that result in no change of motion
17. the friction between objects that causes them not to move
21. the type of forces needed to change the motion of an object
22. work divided by time
24. the force that opposes the motion of objects through the air
26. the tendency of all objects to resist any change in motion
27. the force the machine applies
31. final velocity minus starting velocity divided by the time it takes to change velocity
32. a straight slanted surface
34. a push or a pull
37. force equals mass times acceleration
41. a force that opposes motion between two objects that are in contact
42. a pair of inclined planes that move
44. the measure of inertia