Resposta :
Ecp = Ecf/2
Ecp = 300/2
Ecp = 150J
mf = mp/2
40 = mp/2
mp = 80 kg
300 = 80.(v+1)^2 /2
600 = 80(v+1)^2
7,5 = (v+1)^2
v+1 = 2,74
V = 1,74 m/s
Ecp = 300/2
Ecp = 150J
mf = mp/2
40 = mp/2
mp = 80 kg
300 = 80.(v+1)^2 /2
600 = 80(v+1)^2
7,5 = (v+1)^2
v+1 = 2,74
V = 1,74 m/s