1. (a) In Fig. 4-54, if mA = mB
= 1.00 kg and = 33.0°, what will
be the acceleration of the system? (b) If mA = 1.00 kg and the
system remains at rest, what must the mass mB be? (c) Calculate the
tension in the cord for (a) and (b).
2. If a bicyclist of mass 65 kg (including
the bicycle) can coast down a 6.5° hill at a steady speed of 6.0 km /h because
of air resistance, how much force must be applied to climb the hill at the same
speed (and the same air resistance)?