Question

what is the power output for a 60 kg woman who runs up a 3 m high flight of stairs in 3.5 s , starting fro rest but having a final speed of 2 m/s

Answer 1

Answer:

514.28 watt is the required answer

Explanation:

According to the Question

It is given that,

• Mass of women ,m = 60kg
• Height ,h = 3m
• Time taken ,t = 3.5s

we have to calculate the power output for a woman.

As the woman runs up on the stairs . So we

will calculate the work done by her against gravity .

• Work done = mgh

Substitute the value we get

=> W = 60*10*3

=> W = 1800J

Now, Calculating the power

• Power = Work done/Time taken

Substitute the value we get

=> Power = 1800/3.5

=> Power = 18000/35

=> Power = 514.28 Watt

• Hence, the power for a woman will be 514.28 watts.

Answer 2

Answer:

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Appropriate Question:-

• The output for a 60kg woman who runs up a 3m high flight of stairs in 3.5 sec.starting from rest but having a final speed of 2 m/s.

Given:-

• Mass of woman=m=60kg.
• Height=h=3m
• Time=t=3.5secs.

To find :-

• Here we want to calculate the output for a woman
• Here first we should calculate work done first.

$work \: done = mgh$

• Applying the values,

$work \: done = 10 \times 60 \times 3$

• Work done= 1800Joule.

Now , lets calculate power,

$power = \frac{workdone}{time \: taken}$

Now,

Applying the values ,

$power = \frac{1800}{3.5}$

Power =514.2857 watt.

Hope it helps u mate .

Thank you .