Simple Machines
Complex Machines
MA,SR, and Efficiency
Work, Efficiency, and Hydraulics
Evaluating Machines/Technology Through Change
100
A tool or device made of one basic machine.
What is a simple machine?
100
A system in which simple machines all work together; may contain subsystems and linkages.
What is a complex machine?
100
This is the measure of how much a machine multiplies the force applied to it.
What is mechanical advantage?
100
Work happens when this occurs.
What happens when a force is applied over distance?
100
A roller coaster system should have more of this type of energy at the top of the peaks. 
What is potential energy?
200
This class lever can have a mechanical advantage of 5
What are class 1 and class 2 levers?
200
These have just one specific function each, but they work together to complete the designed task.
What are subsystems?
200
This is the measure of how the speed of the object (and distance that it moves) is affected by a machine.
What is speed ratio?
200
This is the work put into the machine when 800N is applied over 2m.
What is a work input of 1600J?
200
Can you define ergonomics?
he science science of designing home or work places that best suit humans.
300
What are 4 ways simple machines help us?
Change direction of force, multiply force, change speed and/or transfer force
300
These are the gears that decrease turning speed in a device.
What are reducing gears?
300
This would be the mechanical advantage if the input force is 50N and the output force is 1000N.
What is a mechanical advantage of 20?
300
This is the measure of the amount of force applied to a given area.
What is pressure?
300
These are 6 criteria that can be considered when evaluating a machine.
What are efficiency, effectiveness, safety, convenience, and environmental impact, cost, reliability, function, and design?
400
Simple machines decrease this while increasing the other.
What is Force and Distance?
400
This special type of linkage, often found in cars, allows the operator to apply a large force to move objects slowly, or a smaller force to move objects quickly.
What is a transmission?
400
How much work is put into a machine compared to how much work the machine actually does.
What is efficiency?
400
This amount of pressure occurs at the output piston when the input piston puts pressure on the fluid in a closed system.
What is equal pressure at the output piston? This is the effect of Pascal's Law!
400
What are the causes of new/changing technology of wheelchairs?
Changes in science and societal attitudes.
500
This class lever increases the output distance but requires more input force.
What is the 3rd class lever?
500
It needs to be connected to a smaller driven gear
How does a driving gear increase the speed of the system?
500
This converts useful energy into unusable energy, and therefore reduces the efficiency of machines.
What is friction?
500
This is the input force required by an input piston with an area of 5 cm2 when the output piston has an area of 10 cm2 and an output force of 10 N (this system is a hydraulic lift).
What is 5 N?
500
A complex machine designed to do a simple task (and is sometimes slightly ridiculous).
What is a Rube Goldberg machine?