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  • 15 votes cast
Oct
6
comment Motorbike with parachute vs normal skydive
All energy is still there in form of sideways movement, and will leave in form of friction (heat) towards the surface (and air with the parachute) when the biker glides. Look at this video, as long as they glide, nothing happens, it is when they finally hit the side of the road that the concrete barrier that sideways force has to become something else (and may hurt the biker) youtube.com/watch?v=4WmjeeZ44B8. But in my example there is no barrier to hit, so "my biker" would continue to glide until the parachute has absorbed all energy, and that should not be harmful.
Mar
20
comment Motorbike with parachute vs normal skydive
Please clarify what force will kill him? It is not lethal to free-fall 1m, and it is not lethal to glide on the tarmac at 200km/h.
Mar
20
comment Motorbike with parachute vs normal skydive
I was thinking along the same line.
Jul
29
comment Why is 55-60 MPH optimal for gas mileage of a passenger car?
@Georg - That must be the CO2 tax that if the car emits less than 120g/km it is a "green car", and I guess that those cars must drive a specified speed when they measure.
Jul
14
comment Are regular light bulbs better for the eyes than CFLs or “tube lights”?
There is tubes with a more yellow light that is softer on the eyes, and in combination with the flicker free technologies they can come quite close to the lightbulbs.