Using Simple Machines to do Work More Easy. Devices that allow us to perform the same amount of work more easily. Simple Machines Work in One of 3 Ways . Can take the force exerted by the individual and redirect it Can turn a small effort or force into a larger force (mechanical advantage)
Devices that allow us to perform the same amount of work more easily.
Work = (force) (distance) or W = Fd
Force = (mass)(acceleration) or F = ma
1st Class Lever
Load – Fulcrum – Effort
2nd Class Lever
Fulcrum – Load – Effort
3rd Class Lever
Fulcrum – Effort - Load
Effort X distance from the fulcrum =
weight X distance from the fulcrum
The longer the lever, the greater the force amplification and the easier it is to move the load.
However, the longer the lever arm, the shorter the distance will move
But - Too heavy of a mass or too long of lever the lever will break.
An inclined plane does not reduce the amount of work being done –
It simple reduces the force necessary to complete that work by creating a mechanical advantage.
Reduce the effort to raise an object or it redirects the applied force, depending on the type of pulley.
Apparatus for lab looks like this: