All Questions
5
questions
1
vote
1
answer
1k
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What takes more energy? Walking up stairs or ramp over the same height?
Often when we go hiking, we encounter two kinds of paths whenever we have to cover elevation. We either go up via stairs or via walking up a ramp. Sometimes both are available side to side. And it's ...
- 111
8
votes
11
answers
1k
views
Is it more work to put more (apparent) effort to get the same outcome?
I was taking my dogs for a walk yesterday evening when this question occurred to me.
The two dogs were pretty enthusiastic about the walk and wanted to run on ahead, so the leads were taut and they ...
- 257
67
votes
15
answers
22k
views
Why is ascending some stairs more exhausting than descending?
I have been asked this question by school kids, colleagues and family (usually less formally):
When ascending a flight of stairs, you exchange mechanical work to attain potential Energy ($W_\text{...
- 831
0
votes
2
answers
601
views
Stability on a bus
I ride the bus from home to school and vice versa approximately 3-4 times per week for an hour each time. The bus is either bi- or tri-articulated, and it can accelerate to speeds up to 80km/h.
Most ...
0
votes
1
answer
84
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Plausibility of the distance estimation in a cycle ergometer gym exercise
A friend of mine pedaled for an hour on a cycle ergometer, a stationary bicycle in a gym.
At the end of the ride the cycle computer reported a distance of $40\:\mathrm{km}$ and an average power of $...
