Work done by a constant force is work done can be positive negative or zero. These list of physic formula of class 11 chapter work energy power is useful and highly recommended for quick revision and final recap of chapter work energy power.
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This physics video tutorial provides a basic introduction into power work and energy.
Work power and energy formula physics. W ke final ke initial. The work w done by the net force on a particle equals the change in the particle s kinetic energy. Power is defined as work done per unit time.
Electric power definition it is the rate at which work is done or energy is transformed in an electrical circuit. Simply put it is a measure of how much energy is used in a span of time. Conservation of energy links gpe ke and work done.
The kinetic energy of an object can be related to its mass and velocity with the formula this formula for kinetic energy can be found from the equation for work if the force is in the same direction as the object s displacement. In physics the rate of transfer of electrical energy by an electrical circuit per unit time is called electrical power. When work is done energy is used.
Work done by a variable force work energy theorem. In science work has a precise meaning. According to the work energy principle an increase in a rigid body s kinetic energy is caused by an equal amount of work done on that body by a force applied to that body.
Work done is generally referred in relation to the force applied while energy is used in reference to other factors such as heat. In this article we will learn all about the concept of work power and energy. Ep 1 2 k x k is the spring constant and x is the amount of compression or streching.
Work and energy can be considered as two sides of the same coin. For example a man carrying a load is doing work but he is not doing work if he is not moving while keeping the load on his head scientifically work is done only when an effort or force moves an object. Pe mg h m is the mass g is the gravitational acceleration and h is the distance potential energy of the spring.
This formula depends on the kinematic formula the change in position x x 0 is equal to the displacement. Work done is the same as energy transferred. Before moving to physics.
Power is the rate of transfer of energy or the rate of doing work. It explains how to calculate the average power exerted by a constant. Academic team of entrancei prepared short notes and all important physics formulas and bullet points of chapter work energy power class 11 physics.
Work and energy in physics share a close relationship. Thus work and energy are related to each other. In more mathematical terms the relationship can be expressed as.
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