300 J
Ep = m×g×(h₁ - h₂)
= 2kg×10N/kg×(20m - 5m)
= 20N×15m
= 300 J
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Verified answer
300 J
Ep = m×g×(h₁ - h₂)
= 2kg×10N/kg×(20m - 5m)
= 20N×15m
= 300 J