If the density of a small planet is the same as that of earth, while the radius of the planet is 0.2 times that of the earth, the gravitational acceleration of the surface of that planet is |
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a) |
b) |
c) |
d) |

If the density of a small planet is the same as that of earth, while the radius of the planet is 0.2 times that of the earth, the gravitational acceleration of the surface of that planet is |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

**(a)**

Let be the radius of earth and its density, then since shape of earth is assumed spherical

we have

The acceleration due to gravity which arises in the body due to gravitational force of attraction is given by

Putting the value of from Eq.(i), we get

127 votes

127