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# Mechanical Systems 1

### Quiz topics 1-3

What is a machine device that helps humans do work
Archimedes screw moves water from low to high areas
simple machines tool made up of one basic machine with one function
inclined plane make it easier to move heavy objects
wedge splits something apart
screw cylinder with grooves cut in a spiral
pulley rope moving in a grooved wheel
wheel and axle A larger wheel attached to a smaller cylinder. Creates rotational movement
work formula force x distance
work definition measure of energy transfer that turns force into movement
unit for work joules
unit for force newton
unit for distance meter
effort force you exert
fulcrum supports a lever
class one lever fulcrum in the center of lever
class two lever load in the center of lever
class three lever effort in the center of lever
way to remember lever class 3, 2, 1 ELF
mechanical advantage amount that a machine can multiply a force
input force force applied to a machine
output force force done by machine on the load
mechanical advantage calculation output force/input force
mechanical advantage equal to 1 machine is changing the direction of the effort force
gear rotating wheel with teeth around the rim
gear train 2 or more gears together
driving gear driver. This one moves first
Driven gear follower. These move after the first
gear speed ratio number of driver gear teeth/number of follower gear teeth
fixed pulley attached the pulley to something that does not move
moveable pulley the pulley itself moves
combination pulley block and tackle. Mixture of moveable and fixed pulleys
potential energy stored energy ready to do work
kinetic energy energy an object has because of motion
what slows everything down? friction
friction definition a force applied in the opposite direction as the input force
efficiency measurement in percent of how well a machine uses energy.
efficiency formula output work/input work x 100
Created by: carly.riddle
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