Work, Force, Motion

1. An objects change in position relative to a reference point.
4. The speed of an object in a particular direction.
6. The tendency of an object to resist being moved or, if an object is moving, to resist a change in speed or direction until an outside force acts on the object.
7. A device that helps do work by either overcoming a force or changing the direction of the applied force.
9. The unit used to express power; equivalent to joules per second.
12. A machine made of more that one simple machine.
13. A simple machine that consists of a wheel over which a rope, chain, or wire passes.
16. A measure of the amount of matter in an object.
17. The work done by a machine; the product of the ouput force and the distance through which the force is exerted.
19. The rate at which work is done or energy is transformed.
21. A simple machine that consists of a bar that pivots at a fixed point called a fulcrum.
22. The combination of all the forces acting on an object.
27. A number that tells how many times a machine multiplies force
28. The transfer of energy to an object by using force that causes an object to move in the direction of the force.
29. A simple machine that is made up two inclined planes and that moves; often used for cutting.
31. The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity.

1. A quantity usually expressed as a percentage, that measures the ratio of work output to work input.
2. A force of attraction between objects that is due to their masses.
3. The rate at which velocity changes over time.
5. The curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth.
8. A force that opposes motion between two surfaces that are in contact.
10. The unit used to express energy, equal to 1 Newton through a distance of 1 meter.
11. A Measure of gravitational force exerted on an object.
14. The SI unit for force.
15. The work done on a machine; the product of the input force and the distance through which the force is exerted.
18. A simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp.
20. The motion of a body when only the force of gravity is acting on the body.
23. The distance traveled divided by the time interval during which the motion occurred.
24. A quantity defined as the product of the mass and velocity of an object.
25. A simple machine that consists of an inclined plane wrapped around a cylinder.
26. A simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects.
30. A push or pull exerted on an object in order to change the motion of the object.