Work done by a person climbing stairs

[Sen.Lemonsnout]

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.

Homework Equations

w=F•d

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).

 

[tiny-tim]

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!