[填空题]
A bicyclist traveling with spem1gnv4oc ./kf 8qi xqi0lo73xed v=4.2m/s on a flat road is t7h)p;4 , lieq jmpa)whe *bvt4- q*gbmaking a turn with a radius The forces acting on the cyclisejg7tp,hip 4) hvlt be)*-m wq ;a4b*qt and cycle are the normal force $\left(\mathbf{\vec{F}}_{\mathrm{N}}\right)$ and friction force $\left(\mathbf{\vec{F}}_{\mathbf{fr}}\right)$ exerted by the road on the tires, and $m\vec{\mathbf{g}}$ the total weight of the cyclist and cycle (see Fig. 8–56). (a) Explain carefully why the angle $\theta$ the bicycle makes with the vertical (Fig. 8–56) must be given by tan $\tan\theta=F_{\mathrm{fr}}/F_{\mathrm{N}}$ if the cyclist is to maintain balance.(round to the nearest integer) (b) Calculate $\theta$ for the values given. $^{\circ} $ (c) If the coefficient of static friction between tires and road is $\mu_s=0.70$ what is the minimum turning radius? m
Post time 2025-2-18 20:00:22
