Respuestas

2014-02-17T16:54:35+01:00
1. x1 = v1 . t1 = 40 km/h x 0,25 h = 10 km

2. x2 = v2 . t2 = 30 km/h x 0,33 h = 10 km

A. xtotal = x1 + x2 = 10 km + 10 km = 20 km

B. vmedia = xtotal / ttotal = 20 km / (0,25 + 0,33) h = 34,5 km/h