## What are the 3 formulas for power?

P = R × I2 or V2/ R: These formulas are a variant of ohm’s law. Here R stands for resistance, V stands for potential difference and I stands for current. It states that power is directly proportional to the square of potential difference and inversely proportional to the resistance offered by the conductor.

## What is the formula for work and power?

Work and Power Difference in Tabular Form

Criteria | Work |
---|---|

Formula | Total Work Done (W) = Power (P) x Time (t) or Work = Displacement x Force |

Measurement Unit (SI unit) | The standard unit of work is the Joule denoted as (J). Furthermore, you can measure work in electron volt (eV), kWh, GWh, and MWh |

**What is the formula between energy and power?**

So joules per second is one expression of power. If you divide energy by time, you get power. P = E/t. You can rearrange that equation in a few ways.

**What are the formulas for calculating work energy and power?**

The SI unit of power is Watt (W) (which is calculated as joules per seconds). Earlier, power also referred to activity. It is a scalar quantity. The equation to measure power is P = W/t….Difference Between Work and Power.

Work | Energy |
---|---|

Work = force * distance | There are different equations of energy depending on its kind. |

### Is power equal to energy?

Energy and power are closely related but are not the same physical quantity. Energy is the ability to cause change; power is the rate energy is moved, or used.

### What is the formula for charge flow?

In metal conductors the charged particles are free electrons. The electrons are free to move from one ion to another and a net flow of these electrons in one direction is an electric current….The relationship between current I and quantity of charge Q.

I = | I = Q ÷ t |
---|---|

Q = It | Q = I x t |

t = | t = Q ÷ I |

**What is work with formula?**

To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.

**What are the formulas for work energy power?**

Formula Sheet for Work Energy Power. 1. Work done by constant force. W = Force × Component of displacement along force. = displacement × Component of force along displacement. W = FS cos θ ( θ is angle between F → and S →) W = F → ⋅ S → S=r2-r (, S → = r 2 → − r 1 →, displacement vector Δ r →. 2.

## How to calculate the energy of a wave?

For a sinusoidal mechanical wave, the time-averaged power is therefore the energy associated with a wavelength divided by the period of the wave. The wavelength of the wave divided by the period is equal to the velocity of the wave, P ave = E λ T = 1 2 μ A 2 ω 2 λ T = 1 2 μ A 2 ω 2 v. 16.10

## How to calculate the kinetic energy of work?

1. Work done by constant force 2. Work done by a variable force 3. Work done by spring force W = – [ 1 2 kx 22 – 1 2 kx 12] If x 1 = 0 and x 2 = x. Then W = 1 2 kx² 4. Energy Kinetic Energy = 1 2 mv² = p 2 2 m 5. Work – energy theorem 6.

**Which is the correct formula for potential energy?**

Formula: For the potential energy the formula is. P.E. = mgh: Unit : The SI unit of energy is joules (J), which is named in honour of James Prescott Joule. Power: Definition: Power can be defined as the rate at which work is done i.e. energy converted. Formula: The formula for power is. P = W/t: Unit : The unit of power is watt (W).