[填空题]
A bicyclist of mass 65 kg (including the bicycle) can coast down ak: +kj)a 7mdtc, ,otne 6ovc, +t- xbzp0.0$^{\circ} $ hill at a steady speed of 6.0 $\mathrm{~km} / \mathrm{h}$ because of air resistance. How much force must be applied to climb the hill at the same speed and same air resistance?
