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Power

reedelena

Entry posted by reedelena

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In class we have been talking about power and how to calculate the power. Power is the rate at which work is done, the same amount of work can be done with different supplied if the time is different. If an 8 kg box is raised to a height of 2 meters in .5 seconds, what amount of power was supplied. To find the power we have to use to formula that we used in class which is work over time. To find work we must multiply the force times the displacement. We would multiply 8 kg, 9.81 m/s^2 and 2 meters to find the work. Our work in this problem is equal to 156.96 Joules. Then we would divide our work by the time that is provided for us .5 seconds. Once you have divided Joules/second you would get the answer 313.92 watts. This tells us the rate at which the work is done.

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