DefinitionsAny mechanical or electrical device that transmits or modifies energy to perform
or assist in the performance of human tasks..
The Mechanical Advantage of a machine is the ratio of Force being moved W to the Effort F
The Velocity Ratio of a machine is the ratio of the distance moved by the Effort and the distance moved by the Force being overcome.
In the ideal frictionless/weightless machine
The efficiency of a simple machine
The only parameter that can be determined from the machines dimensions is the
velocity ratio.
Incline PlaneOne of the simplest of machines is the inclined plane.. The force Force (F) is the effort required to move the Weight (W) up the slope. A movement of the weight a distance x along the incline will result in a vertical displacement of x Sin(θ)). Assuming that the incline is frictionless the F required to move the weight up the slope = W Sin(θ)). Velocity ratio = 1 /Sin(θ) WedgeVelocity ratio (Single Wedge) = 1 /Tan(θ) Lever
Velocity Ratio (First Class Lever) = B /A Wheel and AxleVelocity ratio = R / r Pulley
ScrewVelocity ratio = R. 2.p / p |

- Simple Machines in Appliances, Gadgets, and Everyday Life..Lots of relevant papers and links
- Simple Machines..University Of Arkansas
- Mysite Machine..A vry informative page of related notes
- Wikipedia Simple Machines ..Excellent Notes and links