**Power is equal to work divided by time**. In this example, P = 9000 J /60 s = 150 W. You can also use our power calculator to find work – simply insert the values of power and time.

Contents

- 1 What is the formula for power?
- 2 What are the 3 equations for power?
- 3 What is work done formula?
- 4 How do you calculate total power?
- 5 How do you find work in physics?
- 6 What is the solution of power in science?
- 7 What is unit power?
- 8 What is power * time?
- 9 How do you find minimum power?
- 10 Which is not formula of power?
- 11 What is stress formula?
- 12 What is work done SI unit?
- 13 What is formula for mass?

## What is the formula for power?

Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).

## What are the 3 equations for power?

P = ΔV^{2} / R We now have three equations for electrical power, with two derived from the first using the Ohm’s law equation. These equations are often used in problems involving the computation of power from known values of electric potential difference (ΔV), current (I), and resistance (R).

## What is work done formula?

Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f. d cos θ.

## How do you calculate total power?

Total power (PT) is defined as: PT = P1 + P2 + P3 Pn. As an example: A series circuit is made up of three resistors with resistance values of 5 ohms, 10 ohms, and 15 ohms. A parallel circuit has the same voltage across each branch that is equal to the source voltage.

## How do you find work in physics?

The formula for work is, work equals force times distance. In this case, there is only one force acting upon the object: the force due to gravity. Plug in our given information for the distance to solve for the work done by gravity. Remember, since the object will be moving downward, the distance should be negative.

## What is the solution of power in science?

Another Formula for Power The expression for power is work/time. And since the expression for work is force*displacement, the expression for power can be rewritten as (force*displacement)/time. Since the expression for velocity is displacement/time, the expression for power can be rewritten once more as force*velocity.

## What is unit power?

Power (P) is the rate at which energy is transferred or converted. Thus, power equals work divided by time (P = W / t). The SI unit of power is the watt (W), in honor of Scottish inventor James Watt (1736 – 1819).

## What is power * time?

In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity.

## How do you find minimum power?

Use the formula for power: Power = Voltage x Current, or P = VI. If you are trying to calculate the minimum load and you happen to only know the power and voltage ratings of your power supply, you can use the formula P = V^{2}/R, which can become R = V^{2}/P.

## Which is not formula of power?

Answer: B) P= V/R and C)P= I²/R IS NOT FORMULA OF ELECRIC POWER.

## What is stress formula?

The stress formula is the divided product of the force by the cross-section area. Stress = frac{Force}{Area} sigma = frac{F}{A}

## What is work done SI unit?

The SI unit of work is the joule (J), the same unit as for energy.

## What is formula for mass?

One way to calculate mass: Mass = volume × density. Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is “kilogram”.