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Answer:
the correct one is the a, U₂ = 2 U₁
Explanation:
The gravitational potential energy is
U = m g h
if the stones reach the same height, the energy of the first stone is
U₁ = m₁ g h
The second stone is twice the mass and reaches the same height
m₂ = 2 m₁
potential energy is
U₂ = m₂ g h
U₂ = 2 m₁ g h
U₂ = 2 U₁
therefore the energy is double.
When reviewing the statements, the correct one is the a