The acceleration due to gravity at earth's surface is g. The acceleration due to gravity at a height equal to the radius of earth from the surface is

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11. The acceleration due to gravity at earth's surface is $g$. The acceleration due to gravity at a height equal to the radius of earth from the surface is

Step 1: The acceleration due to gravity at a height $h$ above the Earth's surface is given by the formula:

$$g' = g \left(\frac{R}{R+h}\right)^2$$

where $R$ is the radius of the Earth and $g$ is the acceleration due to gravity at the Earth's surface.

Step 2: In this problem, the height $h$ is equal to the radius of the Earth, so $h = R$. Substitute this into the formula:

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