Aconstruction worker used 450 n of force to move materials 5 meters in 2 minutes.

how much power did the worker use?
a) 18.75 watts
b) 125 watts
c) 225 watts
eliminate
d) 1125 watts

The worker used the power of 18.75 watts

Option A

Explanation:

Power refers the amount of work done in a unit time. So it is directly proportionate to the force exerted to perform a work and inversely proportionate to the time taken to complete the work. Thus if a work is completed within less time, then the power required to do that work is more. The unit of power is watts.

As work done is the amount of force required to complete the work of displacing an object to complete the work.

Thus, the equation is

So, by applying given values, we get,

Thus the power required by the worker is 18.75 watts.

answer; i believe that the correct answer is (d) a very small amount of mass

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000