First slide

Gravitaional potential energy

Question

A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 km/sec, escape velocity from the surface of the planet would be :

Easy

A

1.1 km/sec
B

11 km/sec
C

110 km/sec
D

0.11 km/sec

Solution

$v_{e} = \sqrt{\frac{2 GM}{R}}$

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