Units of Work
effort to accomplish something
work
The force you apply to a machine
input force
output force over input force
Mechanical Advantage
a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
Lever
A simple machine that changes the direction of a force, often to lift a load.
Pulley
The SI unit of of work or energy
Joule
The force exerted by a machine
output force
the ratio of output to input forces
actual mechanical advantage
the portion of the lever directly connected to the load.
Output arm
a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
wedge
work over time
Power
input distance
the ratio of the input distance to the output distance
Ideal mechanical advantage
The effort arm is the portion of the lever to which we apply the effort, or input force.
input arm
a nail-shaped or rod-shaped piece with a spiral groove and a slotted or recessed head
screw
equal to one horsepower
746 watts
the force exerted on an object by a machine
output distance
the ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in.
efficiency
the point on which a lever rests or is supported and on which it pivots.
fulcrum
wheel and axle
33,000 foot-pounds of work per minute
Horsepower
the energy given by the machine to do useful work
work output
two or more simple machines working together.
Compound machine
what classifies a levers level
Lever Level
inclined plane