# Work done by a person climbing stairs

#### Sen.Lemonsnout

1. Homework Statement
Calculate the work done by a 52.98 kg person, who climbs a set of 0.20 m tall stairs (starting from rest) in 2.96s.
Calculate the power required to achieve this.

2. Homework Equations
w=F•d

3. The Attempt at a Solution
My issue with this question has been identifying the force which is acting in the situation. I know that Fg applies (mass • 9.81 m/s) and that there must be an applied force of some sort because the person is moving (working against gravity, I suppose?), but I am not sure which information I should use to calculate the "F" variable in the w=F•d equation. I think they want the power in watts (Joules per second).

Last edited:
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#### tiny-tim

Homework Helper
Hi Sen.Lemonsnout! Welcome to PF!

Assume that he climbs at a constant speed …

then the net force is zero, so the force he uses is … ?

#### Sen.Lemonsnout

Thanks- I was definitely overthinking things!

"Work done by a person climbing stairs"

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