Respuestas

2011-11-18T22:23:40+01:00

m = 50kg

m = 20kg

v = 5m/s

v = ?

 

m x v = (m + m)v / (m + m)

m x v/ (m + m) = v

v = 50 x 5/50+20

v = 250/70 = 3.57m/s