Mechanical Advantage (MA)
Mechanical Advantage of a machine is defined as a ratio of a load overcome by the machine to the effort applied in the machine.
Mathematically,
MA= load
effort
i.e MA= L
Mechanical Advantage of a machine is defined as a ratio of a load overcome by the machine to the effort applied in the machine.
Mathematically,
MA= load
effort
i.e MA= L
E
It has no unit as it is the ratio of two force.
What is meant by a simple machine having MA3?
It meant that we can overcome the load of 3 Newton (N) by applying the effort of 1N using simple machine.
Velocity Ratio (VR)
Velocity Ratio is defined as a ratio of effort distance to load distance.
Velocity Ratio (VR)
Velocity Ratio is defined as a ratio of effort distance to load distance.
Mathematically,
VR= effort distance
load distance
i.e VR= ED
LD
Efficiency
It is the ratio of work output to work input per 100%.
Mathematically,
Efficiency= Work output
Work Input
= L Í LD
E Í ED
= L Í LD
E ED
= L ÷ ED
E LD
= MA ÷ VR
= MA
VR
= MA
VR
i.e Efficiency= MA
VR
VR