Mechanical Advantage Quiz--Honors Engineering

simple machines

wheel and axle, pulley, lever, inclined plane (ramp), wedge, screw

work

the transfer of energy from one system to another
-work: f x d (force times distance)
-indicates that a force is exerted and it moving something
-simple machines make work easier

inclined plane (ramp)

slanted surface used to raise an object

wedge

-inclined plane that moves
-a triangle shape with a sharp point
-can split, cut, tighten, or hold things together

screw

inclined plane wrapped around a shaft
-used to fasten things together or move things

lever

a bar that is free to pivot or turn around a fixed point

mechanical advantage formulas

output force/input force
and
distance of input force/distance of output force

types of levers:

first class, second class, third class

1st class lever

fulcrum in the middle
ex: see-saw, hammer, scissors

2nd class lever

fulcrum at the end, load in the middle
-ex: wheel barrow, car-jack

3rd class lever

fulcrum at the end, effort in the middle
ex: tweezers, baseball bat