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EkA : EkB = 1 : 8
v2...........?
EkA/EkB = (1/2 mA vA²)/(1/2 mB vB²)
1/8 = 2vA²/vB²
vB² = 8 x 2vA²
vB² = 16vA²
vB = √16vA²
vB = 4vA
vB : vA = 4 : 1
vB = 4 m/s ----> B
,
cmiiw... ^^
m = mass
V = rapidity
Ek = 1/2 mv²
ma : mb = 2:1
Ek a : Ek b = 1:8
Va = 1 m/s