Relation Between Efficiency, Mechanical Advantages and Velocity Ratio of a Lifting Machine:
It is important relation of a lifting machine, which throws light on its mechanism. Consider a lifting machine.
Let W = Load lifted by the machine
P = Effort required to lift the load,
y = Distance moved by the effort, in lifting the load, and
x = Distance moved by the load.
We know that
We also know that
Input of a machine the = Effort applied Distance through Which
Effort has moved.
= P y
And Output of a machine = Load lifted Distance through which the
Load has been lifted
= W x