A body of mass 2 kg is dropped from a height of 20 m. What is its kinetic energy just before hitting the ground? (Take $g = 10$ m/s²)
Solution
By conservation of energy: $KE = mgh = 2 \times 10 \times 20 = 400$ J
About this question
Subject: Physics · Chapter: Work, Energy and Power · Topic: Conservation of Energy
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