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dit : W =.....?
jawab : W = F.s
= m. g . s
= 0,5 . 10 . 8
= 40 joule
2. Ek = 1/2. m. v^2
= 1/2. 0,2 . 8^2
= 1/2. 0,2. 64
= 6,4 joule
3. Ep = m.g.h
= 0,2 . 10. 20
= 40 joule