Question

A man weighing 800N climbs up a flight of stairs to a height of 15m in12.5secs. What is the mans average power output

Answer 1

$\textsf{\huge{\underline{Hello Mate!}}}$

We know that, Power = Work Done/Time Taken

Where Work Done = Force • displacement

Work done = 800 N • 15 m

$\texttt{\blue{Work done = 12000 J}}$

So average power consumed = 12000J / 12.5s

= 960 W

Since 1 W = 1/1000 kW

So, 960 W = 960/1000 kW or 0.96 kW

$\textsf{\red{Hence power consumed is 0.96 kW.}}$

$\textbf{Have great future ahead!}$

Answer 2

hello mate ...

w . k. t

F = 800 N

height / displacement = 15 m

time taken = 12.5 sec

power = work done / time taken

and work done = force * displacement

so work done = 800*15

work done = 12000 J

power = 12000/12.5

power = 960 W

all the best for your future dear mate

don't forget mistakes are the proofs that u are trying

all the best again!!!!!

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