In physics, power is the rate of doing work, the amount of energy transferred per unit time having no direction, it is a scalar quantity in the international system of units , the unit of power is the joule per second (j/s), known as the watt in honour of james watt , the eighteenth-century developer of the steam engine condenser. Visit for more math and science lectures in this video i will explain the basic concept of work, energy, and power. Pendulum lab: hooke's law: energy forms and changes: energy skate park: basics: generator: faraday's electromagnetic lab: masses & springs: my solar system.
The power rating indicates the rate at which that machine can do work upon other objects thus, the power of a machine is the work/time ratio for that particular machine a car engine is an example of a machine that is given a power rating. Work, energy and power: problem set overview this set of 32 problems targets your ability to use equations related to work and power, to calculate the kinetic, potential and total mechanical energy, and to use the work-energy relationship in order to determine the final speed, stopping distance or final height of an object.
Work is a word that has a little bit of a different meaning in physics and today, shini is going to walk us through it also, energy and power produced in collaboration with pbs digital studios. Work, energy and power are highly inter-related concepts that come up regularly in everyday life you do work on an object when you move it the rate at which you do the work is your power output.
Work, energy & power ap physics b there are many different types of energy energy is expressed in joules (j) 419 j = 1 calorie energy can be expressed more specifically by using the term work(w) microsoft powerpoint - ap physics b - work and energy author: hp_administrator. Introduction to power, work and energy - force, velocity & kinetic energy, physics practice problems - duration: 14:46 the organic chemistry tutor 15,280 views 14:46.
To do 100 joules of work, you must expend 100 joules of energy power is the rate of doing work or the rate of using energy, which are numerically the same if you do 100 joules of work in one second (using 100 joules of energy), the power is 100 watts index work concepts hyperphysics mechanics . Since work is a scalar quantity,therefore,power is also a scalar quantitysi unit of power is watt (w)it is defined as:”the power of a body is one watt if it does work at the rate of 1 joule per second (1 j s-1)”sometimes ,for example,in the electrical measurements,the unit of work is expressed as watt secondhowever,a commercial unit of electrical energy is kilowatt hourone kilowatt hour is the work done in one hour by an agency whose power is one kilowatt. The physics classroom » physics tutorial » work, energy, and power work, energy, and power lesson 1 - basic terminology and concepts definition and mathematics of work calculating the amount of work done by forces potential energy kinetic energy mechanical energy.