The formula for power is. The standard metric unit of power is the watt.
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Ep 1 2 k x k is the spring constant and x is the amount of compression or streching.
Energy power formula physics. In older works power is sometimes called activity. Power can be defined as the rate at which work is done i e. Power in physics formula.
The output power of a motor is the product of the torque that the motor generates and the angular velocity of its output shaft. So the more powerful a device is the more energy it will transfer each second. The equation used to calculate the power is.
The si unit of energy is joules j which is named in honour of james prescott joule. P power w or j s. It is the work time ratio.
Power is a rate at which work is done or energy is used. Potential energy of the spring. Power is the rate at which work is done.
Energy can be delivered by a battery or a circuit element for instance a resistor which releases energy as heat. Where v is the potential difference i is the electric current r is the resistance and p is the electric power. As is implied by the equation for power a unit of power is equivalent to a unit of work divided by a unit of time.
Physics formulas work power energy cheatsheet. It is equal to the amount of work done divided by the time it takes to do the work. Power work time or p w t.
Power frac work done time taken. In physics power is the amount of energy transferred or converted per unit time. Using the constant linear mass density the kinetic energy of each mass element of the string with length δ x is δk 1 2 μδx v2 y.
Electric power formula electric power can be said to be the rate at which energy gets transported to or from a part of an electric circuit. Pe mg h m is the mass g is the gravitational acceleration and h is the distance. Power formula can be rewritten using ohms law as p i2r or p v2 r.
The unit of power is the watt w which is equal to a joule per second j s. Hope you have understood about electric energy and power how it is defined its symbol units formula terms. For the potential energy the formula is.
Mathematically it is computed using the following equation. Ek 1 2mv m is the mass v is the velocity. Power rate of doing work if under a constant force f a body is displaced through a distance s in time t then the power p but v uniform velocity with which body is displaced.
In the international system of units the unit of power is the watt equal to one joule per second. In physics we can define energy as the capacity to do work. The kinetic energy k 1 2 mv 2 of each mass element of the string of length δ x is δ k 1 2 δ m v y2 as the mass element oscillates perpendicular to the direction of the motion of the wave.
Power is a scalar quantity.
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