IB Design Technology Topic B3.3.3 Efficiency Calculations Revision Notes (HL)

IB Design Technology Topic B3.3.3 Efficiency Calculations Revision Notes (HL) | RevisionDojo

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Efficiency: The Gap Between What You Put In and What You Get Out

Efficiency measures how much input energy is successfully converted into useful output energy or work.
In mechanical systems like gears and belts, some energy is always lost to heat, friction, or vibration.
It is expressed as a percentage.

Note

Key formula

In general, efficiency compares what you get out with what you put in:
$$\text{Efficiency} = \frac{\text{Useful Output}}{\text{Total Input}} \times 100$$
For mechanical systems, use work or power:
$$\text{Efficiency} = \frac{\text{Output Work or Power}}{\text{Input Work or Power}} \times 100$$
The answer is a percentage, so remember to multiply by 100 and write the percent sign after it.

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:
1. Friction: Between gear teeth.

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Excepteur sint occaecat cupidatat non proident

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Efficiency: The Gap Between What You Put In and What You Get Out

Efficiency measures how much input energy is successfully converted into useful output energy or work.
In mechanical systems like gears and belts, some energy is always lost to heat, friction, or vibration.
It is expressed as a percentage.

Note

Key formula

In general, efficiency compares what you get out with what you put in:
$$\text{Efficiency} = \frac{\text{Useful Output}}{\text{Total Input}} \times 100$$
For mechanical systems, use work or power:
$$\text{Efficiency} = \frac{\text{Output Work or Power}}{\text{Input Work or Power}} \times 100$$
The answer is a percentage, so remember to multiply by 100 and write the percent sign after it.

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:
1. Friction: Between gear teeth.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A. Design in theory8 subtopics

B. Design in practice8 subtopics

C. Design in context8 subtopics

IB Design Technology Topic B3.3.3: Efficiency Calculations Notes

Efficiency: The Gap Between What You Put In and What You Get Out

Context: Gear & Belt Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Efficiency: The Gap Between What You Put In and What You Get Out

Context: Gear & Belt Systems

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A. Design in theory8 subtopics

B. Design in practice8 subtopics

C. Design in context8 subtopics