Simple Machines

3. A combination of two or more simple machines working together.
5. The resistance encountered when two surfaces move against each other.
7. The gear that is turned by the driving gear.
8. The resistance or weight that is being lifted or moved by a machine.
11. The force applied to a machine to achieve work.
12. The ratio of load force to effort force; it indicates how much a machine multiplies force.
13. The gear that provides input power and turns another gear.
14. A series of gears coupled together to transmit motion or torque.
16. The relationship between the input speed and output speed in a mechanical system.
17. A wheel with teeth that engage the links of a chain.
18. A simple machine that uses a grooved wheel and rope to lift heavy loads.

1. A rigid bar that pivots around a fixed point to lift or move a load.
2. A basic mechanical device that changes the direction or magnitude of a force.
4. A flat surface tilted at an angle to help raise a load with less effort.
6. A simple machine consisting of a circular wheel and a shaft, or axle, that rotates together.
9. A toothed wheel that transmits rotary motion and torque through interlocking teeth.
10. The support point on which a lever pivots.
15. The measure of how much input force is converted to useful output force.
16. A smaller part of a larger system that has its own function.