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| *Vultures Knob>>>Road Bike |
Suppose you ride a bike on a flat, straight road at a constant speed.Are the forces acting on the bike? |
balanced or unbalanced Further to Sorro's reply, yes the forces are balanced if the speed is constant and the bike and rider are not changing shape (ha ha). If you are hitting the ground, you are being crushed by gravity because the force of the bike's frame is not strong enough to balance your mass. Better buy a better bike. If you are slowing down, you are not pedaling fast enough to balance the headwind, and friction with the road and wheel bearings. Better train more. If you are speeding up, great, you are OVERbalancing the wind and friction. Finally, if you are floating into the air, you have overcome the force of gravity and are doing an ET. Enjoy your ride. More on the physics of cycling at http://w3.iac.net/~curta/bp/bikesheet.ht... Forces are acting on the bike. You have gravity working on it to keep it down. You have the forward momentum generated by pedaling and the friction working to slow the bike down on the road and in the air. The constant speed is an effect of the forces being in equilibrium. Please explain balance and unbalanced. Friction: air resistance road to tire resistance component resistance Other forces: gravity (the weight of the bike) (the rider's weight) pedal power Balancing forces by the rider AP Physics, cycling experience yup |
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