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Verified answer
Diketahuiva = vb = vp = v = 20 m/s
ma = 75 kg
mb = 50 kg
mp = 225 kg
va' = -50 m/s
Dijawab
p awal = p akhir
(ma + mb + mp).v = ma.va' + (mb + mp).v'
(75 + 50 + 225).20 = 75.(-50) + (50 + 225).v'
350.20 = -3750 + 275v'
7000 + 3750 = 275v'
10750 = 275v'
v' = 10750/275
v' = 39,1 m/s