All Questions
9
questions
1
vote
1
answer
1k
views
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
33
votes
11
answers
12k
views
Why does running spend more energy than walking?
The study energy expenditure of walking and running concludes that running spends more energy than walking.
My understanding is that although running makes one feel more tired, that only indicates ...
- 534
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
18
votes
3
answers
10k
views
Which requires more energy: walking 1 km or cycling 1 km at the same speed? [closed]
I feel more tired walking 1 km than cycling 1 km at the same speed. However when cycling I am moving the extra weight of the cycle along!
- 933
3
votes
1
answer
5k
views
How does eating a cold ice cream actually heat up your body? [closed]
The question is the title itself. During winter one of my friend told we'll have an ice cream. And rest of us where like are you nuts. He was like cold ice-cream actually heats up your body.
Even I ...
- 842
0
votes
3
answers
20k
views
How do Calories (kcal) relate to watts?
In thinking about exercise and "burning calories" it occurred to me that there should be some fairly intuitive correlation between the biological energy conversion going on in a person's body with the ...
- 119
1
vote
5
answers
18k
views
Lifting and putting down a weight
A man in a gym lifts a weight and then puts it down where it was before.
What can be said about the work done by the man to the weight?
Can it be equal in absolute value to the work made by the ...
- 673
0
votes
1
answer
84
views
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 $...
182
votes
14
answers
77k
views
Why does holding something up cost energy while no work is being done?
I read the definition of work as
$$W ~=~ \vec{F} \cdot \vec{d}$$
$$\text{ Work = (Force) $\cdot$ (Distance)}.$$
If a book is there on the table, no work is done as no distance is covered. If I ...
- 5,377