Mechinal Systems Unit Final Flashcards
How do you get mechinal advantage
Ma= output force divided by input force
Speed ratio how to get it
Speed ratio= input divided by output distance
Different simple mechines
Wedge Screw Pulley Wheel axle Inclined plane Lever
Lever
Lever reduces force needed
But
You have to move more then the object
First class is the fulcrum in the middle
Second class is load in the middle
Third class is effort in the middle
Inclined plane
Make it easier to lift things straight up
BUT
You have to exert a forced over a larger distance
Like a ramp
Wedge
A wedge splits an object
Increases force
BUT
You have to have more distance then object
Screw
A screw is a cylinder with a groove in a spiral on the outside
Less force
BUT
Screws are slow
Pulley
Has a wheel and string to pull on string to move the wheel
Lift larger loads
BUT
You increase distance
Wheel and Axle
Increased force
BUT
But ou ahve to have more distance
Complex machines
Complex machine is a machine with more then one simple machine
Subsystems
Subsystems are the part of something that has a certain function
Linkage
Is part that transfers you’re energy
Transmissions
Transmission is a linkage more stronger and more powerful then other linkages
Gears
Gears are essential components of most mechinal systems
How do gears work
The teeth of the driven gears move the other gears
