If you're going down a hill on a bicycle, and at the bottom is a stand-still body of water, with a board mostly in the water, and you hit the board and you're FRONT WHEEL ONLY locks, will you're bike flie over the board with you're front wheel still connected to the board?
My dad says no.
2006-12-20 07:06:52 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Wait, are you saying the front wheel stops entirely? I am not sure I understood the hypothetical situation. Or will the board slide, like someone else supposed?
If the front wheel stops, you will probably flip, since your centre of mass is higher than the axle of your front wheel. But if the front wheel continues moving, your momentum might not cause you to flip... it depends on how fast you are moving and how much your front wheel has decelerated.
2006-12-20 07:15:04 · answer #1 · answered by computerguy103 6 · 0⤊ 0⤋
I see two likely scenarios if the wheel "attaches" to the board upon impact via your breaks on the front wheel alone, and both of them predict that you will flip.
Scenario 1: If the board holds to the cement/road/ground by the shear static friction of your downward force upon it, strengthened by centrifugal action with a positive changing ground slope (upward curve, like a jump) at the point of contact, then the wheel will stop instantly with the board and you will flip.
Scenario 2: If the board slides into the water without much deceleration from friction with the ground (either above or below the water line), then the bicycle will enter a hydroplaning state. Even if the angle of attack is shallow enough at first, the board will tend to quickly increase it's angle of attack with the instability created by the water resistance. This angle of attack while almost immediately approach 90 degrees with the water surface and stop the wheel very quickly, for a beautiful flip.
Not sure how anything can fly over something while remaining connected to it, so I'd answer that, "not possible."
2006-12-20 09:07:36 · answer #2 · answered by Andy 4 · 0⤊ 0⤋
The most likely scenario is the same as would happen on dry land: the front wheel stops and you keep going. There's a slight chance that the board will act like a surfboard and glide across the water with you and the bicycle on it. This could work in a circus act, practiced lots of times beforehand.
2006-12-20 16:33:31 · answer #3 · answered by Frank N 7 · 0⤊ 0⤋
I agree with you dad. The board would be pushed under water and you would slide.
2006-12-20 07:11:27 · answer #4 · answered by shadouse 6 · 0⤊ 0⤋
Assuming that the voltmeters are linked in parallel around the thermistor and the resistor, the resistance of the thermistor = Resistance of the resistor x (Voltage by the time of thermistor / voltage by the time of resistor) you do no longer let us know the resistor cost, whether the thermistor could be 4.3/0.5 (= 8.6) circumstances the resistor cost, based on your figures.
2016-12-18 16:47:02 · answer #5 · answered by ? 4 · 0⤊ 0⤋
sounds like an experiment to me!
2006-12-20 08:03:06 · answer #6 · answered by Mark M 2 · 1⤊ 0⤋