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=1/2 . 0,02 .(400 m/s)kuadrat
= 1/2 . 0,02 . 16000 m/s
= 0,02 . 8000
=160
v = 400 m/s
dit : Ek ?
jwb:
Ek = 1/2 m.v²
= 1/2 0,02 kg.( 400 m/s )²
= 1.600 J
maaf ya kalau salah