What does mgh stand for in physics

One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m. The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy. Work is not a vector quantity, but a scalar quantity. The force acting on an object perpendicular to the surface is called thrust.

It is vector quantity and SI Unit of thrust is Newton. Thrust per unit Area is called Pressure. The SI unit of power is watt W. The power of a body is one watt if it does work at the rate of 1 joule per second. Also, power is 1 watt when the rate of consumption of energy is 1 Js Smallest commercial unit of energy is called Watt hour. It is defined as the amount of electric energy, which flows through a conductor in one hour, at a power of one watt.

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A 71 kg man running at 5. A kg car 2 tons travelling at J Correct! Notice that, since velocity is squared, the running man has much more kinetic energy than the walking man. Also notice how much energy the moving car has. No wonder accidents can cause so much damage! At least one of the values you entered is incorrect. Try again.