Question

The escape velocity from the surface of earth is $V _ { e }$ . The escape velocity from the surface of a planet whose mass and radius are 3 times those of the earth will be

• A. $V _ { e }$
• B. $3 V _ { e }$
• C. $9 V _ { e }$
• D. $27 V _ { e }$

Answer 1

Answer: (A)

$V _ { e }$

Answer 2

$v _ { e } = \sqrt { \frac { 2 G M } { R } }$ ∴

If mass and radius of the planet are three times than that of earth then escape velocity will be same.