tolong bantu jawab pertanyaan di atas fisika no. 8

k pegas = F/Δx
              = 1N/0,01m
              = 100 N/m

W(balok+peluru) = Wpegas
1/2.m.v² = 1/2.k.Δx²
1/2.(0,95+0,05).v² = 1/2.100.(0,2)²
1/2.v² = 1/2.4
v = 2 m/s

mp.vp + mb.vb = (mb+mp).v'
0,05.vp + 0,95.0 = (0,95+0,05).2
0,05.vp = 2
vp = 2/0,05
vp = 40 m/s