stowie
Legendary Member
Very true. For a comparison I play rugby and the difference between hitting a 12st guy and an 18st guy is absolutely massive. One you can barely notice and the other can knock the wind out of you massively. That's only a 50% increase in mass but the difference is huge.
Now compare that with the 900% mark up from bike to car and how anyone could imagine that it wouldn't make any difference is mad. My maths isn't fantastic but wouldn't a bike need to be going at motorway speeds to have the same effect as a car at 25mph
Taking GrumpyGregry's KE result at face value, the bicycle would need to be travelling at around 80mph to generate the same KE (assuming rider + bike = 100kg, but even if the combined weight was 200kg, the speed would need to be around 60mph). Neither speed are ones that I have yet to attain under my own pedal power.