This is the first unit for my second year of engineering, we have been working on simple machines things like: Levers, Wheels, Axles, Pulleys etc.
1st class lever
This is your classic lever which you always see, you have the weight on one end, fulcrum in the middle, and the effort on the other side. IMA= Distance of Effort/Distance of Resistance AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
2nd class lever
This is another type of lever in which the fulcrum is on one end. IMA= Distance of Effort/Distance of Resistance AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
3rd class lever
With a third class lever you have the fulcrum on one end the weight on the other end, and the effort in the middle.IMA= Distance of Effort/Distance of Resistance AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
axle
All the axle is, is a 2nd class lever but rotating to lift the weight. IMA= Distance of Effort/Distance of Resistance AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
complex pulley
With this pulley you are just adding more pulleys which will just increase the mechanical advantage of the machine. Every knew gear you put on decreases the amount of wieght needed to lift the wieght by half. IMA= Distance of Effort/Distance of Resistance AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
Simple Gears
With simple gears you just have one gear meshing with another gear creating a gear train. to get the mechanical advantage you divide the amount of teeth on the output by the teeth in the input.
Inclined plane
An inclined plane is just a ramp that you would have the wieght sitting on, this decreases the amount of force needed to move the wieght upwardsIMA= Distance of Effort/Distance of AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
Simple pulley
This is also known as a fixed pulley, this is used so you would pull down and the weight would go up, this doesnt increase the mechanical advantage. It stays a ratio of 1 to 1 IMA= Distance of Effort/Distance of Resistace AMA= Force of Resistance/Force of Effort Eff= AMA/IMA*100
compound gears
Compound gears are 2 gear trains that use the same axle, use the same equation for the mechanical advantage as used in the simple gears then multiply the two gear trains together
Sprocket and Chain
A sprocket and chain is basically just a gear train but connected by a chain and you use the same equation to get the mechanical advantage as the simple gears