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sb.x:
Pxsebelum = Pxsesudah
m1 . v1 + m2 . v2 = m1 . v1’ + m2 . v2’
1 . 20 + 0,8 . 5 = 1 . v1’ + 0,8 . v2’
v1’ + 0,8. v2’ = 24 ....(1)
sb.y:
Pysebelum = Pysesudah
0 = 1 . v1’sin45+ 0,8 (-v2’sin45)
0,8 . v2’sin45 = v1’sin45
0,8 v2’ = v1’ ....(2)
(1) dan (2)
v1’ + 0,8 . v2’ = 24
0,8 . v2’ + 0,8 . v2’ = 24
1,6 . v2’ = 24
v2’ = 15 m/s
v1’ = 0,8 . 15 = 12 m/s