Question

Escape velocity of a planet is ve if radius of the planet remains same but mass becames 4 times the escape velocity becomes

Answer 1

Explanation:

The excape velocity formula is:

where M is the Mass of the planet and r is the radius of the planet, considering you would like to launch a ship of its surface. If you want to calculate how fast is the escape speed from a certain height, then r is the distance till the center of mass. (G ≈ 6.67×10^(−11) m3·kg−1·s−2)

now, Ve =3 Vearth , r=4 Rearth

Thus M=2.15 * 10^26

Where

Vearth = 11186 m/s

Rearth = 6371000 m

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