Potential Energy: Hiker at 1600m to 3100m - Change, Work, & Explanation

[rphmy]

A 55-kg hiker starts at an elvation of 1600 m and climbs to the top of a 3100-m peak. (a) What is the hiker's change in potential energy? (b) What is the minimum work required of the hiker? (c) Can the actual work done be more than this? Explain

 

[physicsbhelp]

i know how to do part a, but can you by any chance help me with my problem, its titeled LOOP problem with DIAGRAM!

 

[physicsbhelp]

a) mgh= mgh
55(9.81)(1600)=(55)(9.81)(h)

you just solve for height by the equation above.

 

[rcgldr]

> Can the actual work done be more than this?

What's the aerodynamic drag at 1 to 3 miles per hour?