click below
click below
Normal Size Small Size show me how
unit f chapter 2
vocab
Question | Answer |
---|---|
work | the results when a force causes an object to move. |
machine | a device that changes the amount of force applied to an object. |
lever | a simple machine. |
fulcrum | the fixed point on a lever. |
effort arm | the part of a lever on which a person or an other machine applies a force. |
resistance arm | the resistance or load on a lever. |
pulley | a wheel that has a groove in its edge. |
wheel and axle | a central machine that has a central pivot around which a wheel moves. |
inclined plane | a flat sloping surface. |
wedge | a simple machine composed of 1 or 2 inclined planes. |
screw | an inclined plane wrapped around a cylinder or cone. |
compound machine | a device made up of 2 or more simple machines. |
efficiency | the ratio of the workthat comes out of a machine to the work put in it. |