Rolling+Resistance+and+Air+Resistance

Rolling Resistance vs Air Resistance

Bicyclists encounter different complications in air and rolling resistances if there was no friction at all bicyclists could ride forever at the same speed without slowing down and having to start pedaling all over again. But there is and power is what keeps the bike moving through the resistance. In power (watts) a 75 kg rider on a 10 kg bicycle must supply to maintain a constant speed is P=0.2581v+3.509v V=the speed in meters per second 3.509V=the power required to overcome rolling resistance 0.2581v=the power required to overcome the air resistance If a bicycle racer rides at an average speed of 11 m/s (25 mi/h) for a two-hour race, how much power must be supplied to ride at this speed? P=0.258v^3+3.509v P(11)=0.2581(11)^3+3.509(11) P(11)=343.5311+33.99 P(11)=382.1 h How much of this power is used to overcome rolling resistant? P=3.509(11) P=38.599 How much of this power is used to overcome air resistant? P=0.258(11)^3 P=343.5311 Based on previous calculations what are some things a racer could do to improve his race time?