- #1
doubleyou
- 7
- 0
Hey there
I'm wondering why it's remarkably more exhausting to ride a bike with a flat tire, compared to a bike with a hard inflated tire.
The friction force "killing my efforts" so to speak, should be the same;
the normal force is the same (my mass doesn't change), and the friction coefficient should be the same as well (the material of the tire is obviously the same, and the surface shape is the same), so the friction coeffecient should very well be the same if you ask me.
The only thing that changes in the situation, is the area of contact between tire and road, but that DOESN'T matter - friction is independant of the area it's working on.
So WHY is it more exhausting to ride a bike with a flat tire?PS:
I know the argument why race cars use wide tires - that's because the tire is more soft, and therefore the tire needs to be big to be stable. So the friction is better because of different friction coefficient and not because of the width of the tires...
But in this case with the bikes, the coefficient doesn't change, and the normal force is also the same - so the friction should be the same...
I'm wondering why it's remarkably more exhausting to ride a bike with a flat tire, compared to a bike with a hard inflated tire.
The friction force "killing my efforts" so to speak, should be the same;
the normal force is the same (my mass doesn't change), and the friction coefficient should be the same as well (the material of the tire is obviously the same, and the surface shape is the same), so the friction coeffecient should very well be the same if you ask me.
The only thing that changes in the situation, is the area of contact between tire and road, but that DOESN'T matter - friction is independant of the area it's working on.
So WHY is it more exhausting to ride a bike with a flat tire?PS:
I know the argument why race cars use wide tires - that's because the tire is more soft, and therefore the tire needs to be big to be stable. So the friction is better because of different friction coefficient and not because of the width of the tires...
But in this case with the bikes, the coefficient doesn't change, and the normal force is also the same - so the friction should be the same...
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