$$\text{Efficiency (%)}= \left(\frac{\text{Output Work or Power}}{\text{Input Work or Power}}\right) × 100$$
Note
Efficiency is always less than 100% due to energy losses from friction, heat, and other factors.
Context: Gear & Belt Systems
Gear-driven systems: Efficiency in these systems is influenced by:
Friction: Between gear teeth.
Material: Type and quality of the gears.
Alignment: Proper alignment reduces energy loss.
Belt-driven systems: Efficiency can be affected by belt slip, tension, and pulley alignment.
Typical efficiencies:
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What is efficiency in mechanical systems?
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Note
Introduction to Efficiency
Efficiency measures how well a system converts input energy into useful output energy.
It is expressed as a percentage.
In mechanical systems, some energy is always lost to heat, friction, or vibration.
DefinitionEfficiencyThe ratio of useful output energy to input energy, expressed as a percentage.AnalogyThink of efficiency like a leaky bucket: the water you catch is the useful output, and the water you pour in is the input. The leaks represent energy losses.ExampleA car engine that converts 30% of fuel energy into motion has an efficiency of 30%.
