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A student who weighs 560 N climbs a stairway (vertical height of 2.7 m) in 27 s. (a) how much work is done?
(b) what is the power output of the student?

Respuesta :

Explanation:

It is given that,

Force acting on the student, F = 560 N

Vertical height, h = 2.7 m

Time taken, t = 27 s

(a) Work done, W = F × h

[tex]W=560\ N\times 2.7\ m[/tex]

W = 1512 Joules

(b) The power output of the student is given by :

[tex]P=\dfrac{W}{t}[/tex]

[tex]P=\dfrac{1512\ J}{2.7\ s}[/tex]

P = 560 watts

Hence, this is the required solution.

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