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ch4aika [34]
4 years ago
10

Lawrence is able to lift 100kg to a height of 1.5m in 0.75 seconds. how much power did lawrence use?

Physics
1 answer:
netineya [11]4 years ago
5 0

Answer:

<em>Power= 1306.67 Watt</em>

Explanation:

<u>Power</u>

The concept of power is related to how long it takes to some agent to do work.  The work done by a force \vec F is

W=\vec F \cdot \vec x

Where \vec x is the displacement. The operation is known as dot-product which results in a scalar equal to the magnitude of the projection of F by the distance.

The power can be computed by

\displaystyle P=\frac{W}{t}

In this case, the force Lawrence is applying is the necessary to lift the object and beat its weight, so

F=mg=100\ kg\ 9.8\ m/s^2=980\ J

The power is:

\displaystyle P=\frac{980}{0.75}=1306.67\ Watt

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