If the radius of earth shrinks by $2 \%$ while its mass remains same. The acceleration due to gravity on the earth's surface will approximately :
Solution
<p>The acceleration due to gravity (g) on the surface of a planet is given by the formula:</p>
<p>$g = \frac{G M}{R^2}$</p>
<p>where:</p>
<ul>
<li>G is the gravitational constant,</li>
<li>M is the mass of the planet,</li>
<li>R is the radius of the planet.</li>
</ul>
<p>If the radius of the Earth shrinks by 2% but its mass remains the same, the new acceleration due to gravity (g') will be:</p>
<p>$g' = \frac{G M}{(0.98R)^2} = \frac{G M}{0.9604 R^2} = \frac{g}{0.9604}$</p>
<p>This implies that g' is approximately 1.0412 times g, or an increase of approximately 4.12%.</p>
<p>Therefore, the acceleration due to gravity on the Earth's surface will approximately increase by 4%. </p>
About this question
Subject: Physics · Chapter: Gravitation · Topic: Kepler's Laws
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