Question: For the earth escape velocity is 11.2 km/s. What will be the escape velocity of that planet whose ma...

Question

For the earth escape velocity is 11.2 km/s. What will be the escape velocity of that planet whose mass and radius are four times those of earth ?

Answer 1

v_e = $\sqrt { \frac { 2 \mathrm { GM } _ { \mathrm { p } } } { \mathrm { R } _ { \mathrm { p } } } }$

$\sqrt { 4 \times \frac { 1 } { 4 } }$ = 1

or v_p = v_e = 11.2 km/s