What is power defined as in physics?
power, in science and engineering, time rate of doing work or delivering energy, expressible as the amount of work done W, or energy transferred, divided by the time interval t—or W/t.
What is power in physics and examples?
Power is the rate at which work is done. The SI unit for power is the watt W, where 1 watt equals 1 joule/second (1W=1J/s). Because work is energy transfer, power is also the rate at which energy is expended. A 60-W light bulb, for example, expends 60 J of energy per second.
What is power and how is power defined?
We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s). Sometimes the power of motor vehicles and other machines is given in terms of Horsepower (hp), which is approximately equal to 745.7 watts.
What is power and its unit?
Watt
Power/SI units
What is power and its importance?
Power is the capacity to cause change, produce effects on others or potentially influence others (PSU WC, L. 7.). Power is the function of a relationship because it belongs not only to the leader, but also to the followers and the situation.
How do you calculate power in physics?
In physics, you can calculate power based on force and speed. Because work equals force times distance, you can write the equation for power the following way, assuming that the force acts along the direction of travel: where s is the distance traveled. However, the object’s speed, v, is just s divided by t, so the equation breaks down to.
What is the formula for power in physics?
The equation for power is P = W/t. P stands for power (in watts) W stands for the amount of work done (in Joules) or energy expended (in Joules) t stands for the amount of time (in seconds)
What is the definition of power according to physics?
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.
What is an example of power in physics?
In physics, power is the rate at which energy is transferred, used, or transformed. For example, the rate at which a light bulb transforms electrical energy into heat and light is measured in watts—the more wattage, the more power, or equivalently the more electrical energy is used per unit time.