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sci. mrs.margavio
cards lessons science
Question | Answer |
---|---|
work | when a force causes an object to move in the direction of the applied force |
machine | any device what changes the amount of force aplied to an object the directions of the force or both |
lever | a simple machine having a arm that moves around a fixed point |
fulcrum | fixed point |
effort arm | the of a lever on which a person or another machine applies the force |
resistance arm | the part of a lever that applies a force on an object |
pulley | a wheel that has a groove alonf the edge |
wheel and axle | a simple machine in which either a wheel turns an axle or an axle turns a wheel around a central point |
inclined plane | any flat slopping surface |
wedge | a simple machine made up 1 or 2 inclined planes |
screw | inclined plane wrapped around a cylinder or cone |
compound machine | a decvice that is made up of 2 or more simple machines |
efficieny | the ratio of the work that comes out of a machine to the work put into the machine |