Question

Two satellites of same mass are orbiting round the earth at heights of r₁ and r₂ from the centre of earth. Their potential energies are in the ratio of ______.

Options

• r₂/r₁ 

• r₁/r₂ 

• r₁/(r₁ + r₂)

• r₂/(r₁ + r₂)

Answer 1

Two satellites of same mass are orbiting round the earth at heights of r₁ and r₂ from the centre of earth. Their potential energies are in the ratio of r₂/r₁.

Explanation:

`"KE"_1/"KE"_2=("V"_1/"V"_2)^2=(sqrt("r"_2/"r"_1))^2="r"_2/"r"_1`