A 56.5-kg hiker starts at an elevation of 1270 m and climbs to the top of a 2660-m peak?

S

SpaceBoy360°

New member
A 56.5-kg hiker starts at an elevation of 1270 m and climbs to the top of a 2660-m peak.

a) What is the hiker's change in potential energy?
- Can I do it by using PE = mgh for both the 1270 m and 2660 m and then find the difference between them by subtracting?

b) what is the minimum work required of the hiker?
- w = f * d
Can I just find the work for both of the distances and then subtract them?

c) Can the actual work be greater than this?

I don't know this one.

Any help, please?
lol, I have just realized that my answer for a is the same for b :-}
 
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