Physics

# Difference Between Mechanical Advantage And Efficiency in tabular form

Difference Between Mechanical Advantage And Efficiency

 MECHANICAL ADVANTAGE EFFICIENCY Definition It is the ratio of load and effort If a weight w is raised by a machine when effort P is applied Mechanical advantage  = It is the ratio between work done by the machine (output) to the work done on the I W machine (Input). Efficiency      = Machine Output lf the mechanical advantage is greater than one, the machine will make our work easier. We can never et more work out of a machine than we put in Le. a machine cannot create any energy.

MCIIAN1CAL ADVANTAGE

Definition

The ratio between the load lifted and the effort applied is called the mechanical advantage of a machine.

MATHEMATICAL EXPRESSION

If W is the weight lifted by the machine and P is the effort applied to the machine, then

The weight lifted by the machine

Mechanical Advantage =

M.A =……………………………. (3)

Since mechanical advantage is the ratio between two forces, so it has no unit. It is expressed n numbers.

EFFICIENCY

The ratio between the useful work done by the machine (output) to the work done on the machine (input) is called efficiency.

Efficiency =

………………………… (4)

Efficiency is usually expressed in percentage.

Eff          =

The efficiency of a reel machine is always less than l.A perfect machine has 100% efficiency or 1

For an ideal machine

Efficiency    =      1

Or            =            1

Or output          =        input