What kind of force does it take to do a wheelie?
955906
You take the weight of the vehicle and find its CG (center of gravity).  Get the distance from the CG to the power wheel. That is the moment arm.  You must have enough torque to overcome the weight times the moment arm.\nThis is a simplified explanation, as I am not getting into mass and gravity.
9163
There is a force, called centripetal force, that exerts on every body in rotational movement. If that force would not exist the body would go in straight line.\nThe magnitude of that force is\n\nF=m ω^2 r\n\nwhere m [kg] is the mass of the body, ω [rad/s] the angular velocity of the body and r [m] the radius of the trajectory.\n\nWe have the relation between rpm and angular velocity:\n\nrpm=60ω/2π => ω=πrpm/30\n\nHence, F=m π^2 rpm^2 r/900\n\nAccording to Newton: F=m a  (where a is the acceleration in m/s^2)\n\nThus a=π^2 rpm^2 r/900\n\nto get the expression in g you divide both sides of the equation by gravity's acceleration g (~9,81 m/s^2)\n\nSo RCF=(π^2 rpm^2 r) / (900 g) \n(RCF=relative centrifugal force)\nRCF=1.118*(10^-3) * rpm^2 * r        in SI units
454463
There are many answers to your question. Gravity obviously. Another example is if you are try to lift a car with a lever or using a pulley to lift something.
1178774
Try turning tricks.  Either way your gonna get F*U*C*K*E*D.
1147748
They do not stay up by gyroscopic principles.\n\nIf the wheels were heavy enough to behave like gyroscopes you would not be able to turn corners.\n\nThink about it, if the angular momentum of the wheels was enough to stop them tilting under the weight of you and the bike, then they would also be enough to stop you turning the front wheel.\n\nNow ask the question properly :-)
53877
car, windmill, bicycle, propeller, anything with gears, hope this helps
575330
In brief.... friction.\n\nBasically, there is friction at the hub of the wheel which is acting as a force that slows down the wheel. In addition, there is also friction between the wheel and the air surrounding it (often called wind resistance). The two forces will eventually stop the wheel.
130702
make the back wheels also turn.
1093289
spinning wheels go round and round
230418
How did you learn to ride a bike?  I'm sure that you can get some heavy duty training wheels from somewhere.
729580
I suppose your talking about High gear or Low gear.\n\nLets say 1-18.\n\nLower gears like 1-10 will be tougher to pedal. And are great for going up hills or getting a leg workout.\n\nHigher gears like 10-18 will be looser and easier to pedal. Great for flat surface or going down hill.\n\nSpeed is only a factor when the amount of force applied meets the momentum required to achieve the speed.\n\nIf your legs are strong enough in low gear you can push hard and move fast. If you've got some good cardio going, that you can really get moving in a high gear too.
347555
Depends also if it is muscle or fat.  The muscle can overcome the inertia & air friction.
1156123
The wheels in contact with the ground are the only source of force to change your motion from straight-line.  On flat ground, only the motorcycle can lean into the turn.
137827
Your answer is in your question.  It limits the amount of slip from one wheel and transfers the power to the other wheel.
938764
you need harder wheels and a higher ABEC bearing for them.:)
437948
On a motorcycle, hit on the front brake, not too hard, but enough to slow down the front wheel but still be able to harness the momentum shift when applying the brake, which tilts the motorcycle at an angle, usually about 60 degrees, and the motorcycle keeps rolling.\n\nAn endo is when the front tire is still on the ground and the back is in the air.  It's the opposite of a wheelie.  Rolling just means you're still in motion when you're doing it
291689
To make a 2 wheel robot, you first investigate the principles of vertical balance of a subject. To determine the balance of bipedal robots or planes, gyroscopes are used. In past gyroscopes were large mechanical devices, but now there very small electronical gyroscopes that you can easily find via internet.\n\nThe second step is using of signals coming from gyroscope to find balance. If your robot tends to fall forward you should make sudden small move to forward too and vice versa.\n\nYou should tend a bit forward while making forward motion and vice versa, too.\n\nI hope you can do what you want to do.