Any job that needs more force to it than you can provide.
Examples:
- Lift a rock
- Open a crate
- Crack a walnut
- Pull a nail out of a board
- Ride a see-saw with a 400-lb friend on the other end
- Snap the cap off of a bottle of root beer
Second class lever. . . . Always greater than 1 . Third class lever . . . . . Always less than 1 . First class lever . . . . . Can be greater than 1 or less than 1 depending on position of fulcrum.
output force (:
Well it depends on what you are using for a pulley the mechanical advantage is equal to the number of ropes lifting the object such as if you have one pulley the MA (mechanical advantage) is equal to 1 if you have two pullies the MA is 2 if you are using a lever such as a seesaw you have to move the fulcrum as close to the object being lifted and have to longest possible input arm. If you modify a seesaw a 60 pound child can lift a 200 pound adult. That is about all i know hope it helps if you are using a different simple machine or need more help email me at : icecbejohn@yahoo.com
a lever with an effort arm of 2 inches
greater than
Mechanical advantage refers to the ratio of the force produced by a machine to the force applied to it. A lever with a mechanical advantage greater than one is used to increase distance.
A second class lever always has a mechanical advantage greater than 1.
A lever with a mechanical advantage greater than one is used to increase distance. A lever is a simple machine connected to ground by a hinge called a fulcrum.
increase distance.
Second class lever. . . . Always greater than 1 . Third class lever . . . . . Always less than 1 . First class lever . . . . . Can be greater than 1 or less than 1 depending on position of fulcrum.
Because of the lever's mechanical advantage.
lever, gear train
Every lever has a mechanical advantage. It may be less than ' 1 ' ... the outputforce may be less than the input force ... but it can always be calculated.The 'ideal' mechanical advantage ... that is, in the absence of losses ... isClass I lever . . . . . any number, depending on dimensions of the structureClass II lever. . . . . more than 1Class III lever.. . . . less than 1
The mechanical advantage of a pulley can be greater than 1.The efficiency cannot but that is a different matter.
'Mechanical Advantage' of a 3rd class lever is always less than 1. Force on the resistance is less than the effort force. Distance moved by the load is greater than distance moved by the effort. Eg: fishing pole.
Mechanical Advantage is given by the following equation: MA = Load Effort On a class 2 lever, the fulcrum (pivot) is at one end of the lever and the work applied is at the other end. The load is then applied near the fulcrum, as common with the wheel barrow. A class 3 lever has the effort applied between the fulcrum and the resistance. Therefore, a much greater effort will be required to produce the same moment value. A typical C2 lever has a much greater distance in which to produce the load than a C3 lever.
... is always less than 1 .