[填空题]
(a) For a bicycle, how is thf21yss5 dzxtg : m.te:e angular speed of th-8z0 9frqky)sh21 tiqo,2uvt cahe f/e rear wheel ($\omega_R$) related to that of the pedals and front sprocket ($\omega_F$) Fig. 8–52? That is, derive a formula for ($\omega_R$)/($\omega_F$) Let $N_F$ and $N_R$ be the number of teeth on the front and rear sprockets, respectively. The teeth are spaced equally on all sprockets so that the chain meshes properly. (b) Evaluate the ratio ($\omega_R$)/($\omega_F$) when the front and rear sprockets have 52 and 13 teeth, respectively, (c) when they have 42 and 28 teeth.
Post time 2025-2-18 20:00:22
