Stair climbing and energy

  • #1
kthejohnster
23
0

Homework Statement


How much mechanical energy is needed for avg size person to climb climb up nine flights of stairs?


Homework Equations


E=KE+PE
PE=mgh
KE=1/2mv^2

The Attempt at a Solution


person is about 80kg
g=9.8ms^-2
h is about 3 meters per floor for 10 floors = 30m

so at top, when the person stops climbing there is only PE so E=0+80*9.8*30=23520J

isn't this only like 4 kcals? doesn't that seem low?
 
Last edited:

Answers and Replies

  • #2
edgepflow
688
1
Your equation is OK. Did not check your numbers.

Maybe that is why people need to climb many stairs to lose weight!
 

Suggested for: Stair climbing and energy

  • Last Post
2
Replies
66
Views
2K
Replies
5
Views
323
Replies
15
Views
613
  • Last Post
Replies
6
Views
327
Replies
32
Views
958
  • Last Post
Replies
6
Views
182
Replies
4
Views
429
Replies
1
Views
261
Replies
5
Views
394
  • Last Post
Replies
12
Views
828
Top