a box that weighs 575 n is lifted a distance of 20.0 m straight up by a rope. the job is done in 10.0 s. what power is developed in watts and kilowatts?

Respuesta :

Power is developed in watts and kilowatts is 1.15 kW

[tex]$\begin{aligned} P &=\frac{W}{t}=\frac{F d}{t}=\frac{(575 \mathrm{~N})(20.0 \mathrm{~m})}{10.0 \mathrm{~s}} \\ &=1.15 \times 10^3 \mathrm{~W}=1.15 \mathrm{~kW} \end{aligned}$[/tex]

Power can be defined as the amount of work completed in a given amount of time. Watt (W), which is derived from joules per second (J/s), is the SI unit of power. Horsepower (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motor vehicles and other devices.

The standard metric unit for power is a Joule / second, sometimes known as a Watt and abbreviated W. The unit for standard metric labor is the Joule, while the standard metric unit for time is the second.

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