Question

Escape velocity on a planet is $v _ { e }$ . If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes

• A. $4 v _ { e }$
• B. $2 v _ { e }$
• C. $v _ { e }$
• D. $\frac { 1 } { 2 } v _ { e }$

Answer 1

Answer: (B)

$2 v _ { e }$

Answer 2

⇒ $v _ { e } \propto \sqrt { M }$ if

If the mass of the planet becomes four times then escape velocity will become 2 times.