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Ep = m.g.h
EM = Ep + Ek
Ek = ½ × 2 × 10²
= 100 J
Ep = 2× 10 × 15
= 300 J
EM = 100 + 300 = 400 J
Ek=
Ep=
[tex] E_{m} = 100 + 300 = 400J