Help Solve Human Energy Problem - 50 kg Hiker Climbs 1000m Mountain

  • Thread starter Thread starter jmandas
  • Start date Start date
  • Tags Tags
    Energy Human
AI Thread Summary
To solve the human energy problem for a 50 kg hiker climbing a 1000m mountain in 3 hours, first calculate the total energy expenditure by multiplying the energy rate of 4x10^4 J/min by the total climb time of 180 minutes, resulting in 7.2x10^6 J. The potential energy gained from the climb is calculated using the formula mgh, yielding 490,000 J. Subtracting the potential energy from the total energy expenditure reveals that the remaining energy, approximately 6.71x10^6 J, is released as heat in the body. This calculation highlights the significant energy loss as heat during physical exertion. Understanding these energy dynamics is crucial for addressing the human energy problem.
jmandas
Messages
10
Reaction score
0
human energy problem!

okay...i have this assignment that's due tomorrow morning so I'm begging for some help. There is only one problem that I'm totally lost on.

A 50 kg hiker climbs a mountain 1000m high in 3 hrs. Assuming the average O2 consumption during his climb was 2x10^-3 m^3/min(2 liters/min) corresponding to an energy expenditure of 4x10^4J/min, how much energy appears as heat in the body?

:cry:
Any help would be great...Thanks so much! :smile:
 
Physics news on Phys.org
Calculate the total energy expenditure (Rate * climb time)

How much of this is used to overcome the potantial energy?

How much is left? What ever left should appear as heat in the body.
 
thanks so much that worked
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Struggling to make relation between elastic force and height'

Thread 'Struggling to make relation between elastic force and height'

Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
View full post »

Similar threads

Hiker climbs top of mountain; energy conversion problem
Replies
12
Views
9K
Solve Work & Energy Problem: Urgent Help Needed by 11:59PM
Replies
2
Views
1K
Solve Work-Energy Theorem Problems with Expert Help
Replies
3
Views
5K

Hot Threads

Recent Insights

Back
Top