A (nonrotating) star collapses onto itself from an initial radius $R_{1}$ with its mass remaining unchanged. Which curves in figure best describes the gravitational acceleration $a_{g}$ on the surface of the star as a function of the radius of the star during the collapse

a

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b

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c

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d

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Solution

The correct option is B $b$
Gravitational acceleration, $g = \frac{G M}{R^{2}}$ where $M$ and $R$ are mass and radius of star respectively.
So, Graph b describes $g$ on the surface of the star as a function of radius.

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A (nonrotating) star collapses onto itself from an initial radius R1 with its mass remaining unchanged. Which curves in figure best describes the gravitational acceleration ag on the surface of the star as a function of the radius of the star during the collapse

The correct option is B bGravitational acceleration, g=GMR2 where M and R are mass and radius of star respectively.So, Graph b describes g on the surface of the star as a function of radius.

A (nonrotating) star collapses onto itself from an initial radius $R_{1}$ with its mass remaining unchanged. Which curves in figure best describes the gravitational acceleration $a_{g}$ on the surface of the star as a function of the radius of the star during the collapse

The correct option is B $b$
Gravitational acceleration, $g = \frac{G M}{R^{2}}$ where $M$ and $R$ are mass and radius of star respectively.
So, Graph b describes $g$ on the surface of the star as a function of radius.