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The Power and Efficiency Calculator is provided in support of our Physics Tutorials on Work, Energy and Motion which explores Motion, the different types of energy, kinetic energy, gravitational potential energy, elastic potential energy. power and efficiency with practical working examples and formula. A list of the supporting Work and Energy Physics Tutorials is available at the bottom of this page. This calculator will calculate:

- Output power of a machine
- Efficiency of a machine when input and output parameters are given

Output Power (P_{out}) W | |

Efficiency _{[ Equation 1 ]} (e) | |

Efficiency _{[ Equation 2 ]} (e) |

**Note:**

- When an object moves vertically, the distance Δx represents the height h. Also, sometimes the force F needed to move an object represents the weight of the object itself.
- Efficiency has no associated unit

Please note that the formula for each calculation along with detailed calculations is shown further below this page. As you enter the specific factors of each force calcualtion, the Power and Efficiency Calculator will automatically calculate the results and update the formula elements with each element of the force calculation. You can then email or print this power and efficiency calculation as required for later use.

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P_{out} = *F × ∆x**/**t*

P_{out} = × */*

P_{out} = W (Watt)

P

P

Equation 1 provides efficiency as a measurement of Input Power P_{tot} and the Output Power P_{out} calculated in the previous equation.

e = *P*_{out}*/**P*_{tot} × 100%

e =*/* × 100%

e =

e =

e =

Equation 2 provides efficiency as a measurement of Input Energy E_{tot}

e = *F × ∆x**/**E*_{tot} × 100%

e = × */* × 100%

e =*/* × 100%

e =

e =

e =

e =

- 3.1 - Motion. Types of Motion
- 3.2 - Position, Reference Point
- 3.3 - Displacement and Distance in 1 Dimension
- 3.4 - Displacement and Distance in 2 and 3 Dimensions
- 3.5 - Speed and Velocity in 1 Dimension
- 3.6 - Speed and Velocity in 2 and 3 Dimensions
- 3.7 - The Meaning of Acceleration. Constant and Non-Constant Acceleration. Gravitational Acceleration
- 3.8 - Equations of Motion
- 3.9 - Position v's Time and Distance v's Time Graph
- 3.10 - Velocity v's Time and Speed v's Time Graph
- 3.11 - Acceleration v's Time Graph
- 3.12 - Motion in Two Dimensions. Projectile Motion
- 3.13 - Relative Motion

- 4.1 - What Causes Motion? The Meaning of Force
- 4.2 - Types of Forces I. Gravitational Force and Weight
- 4.3 - Types of Forces II. Resistive Forces (Frictional Force. Drag). Terminal Velocity
- 4.4 - Types of Forces III (Elastic Force and Tension)
- 4.5 - Newton's First Law of Motion. The Meaning of Inertia
- 4.6 - Newton's Second Law of Motion
- 4.7 - Newton's Third Law of Motion

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