The escape velocity of an object on a planet whose $g$ value is $9$ times on earth and whose radius is $4$ times that of earth in $km/s$ is
The escape velocity of an object on a planet whose $g$ value is $9$ times on earth and whose radius is $4$ times that of earth in $km/s$ is
$67.2$
$33.6$
$16.8$
$25.2$
The escape velocity of an object on a planet whose $g$ value is $9$ times on earth and whose radius is $4$ times that of earth in $km/s$ is
$\frac{{{v_p}}}{{{v_e}}} = \sqrt {\frac{{{g_p}}}{{{g_e}}} \times \frac{{{R_p}}}{{{R_e}}}} = \sqrt {9 \times 4} = 6$
${v_p} = 6 \times {v_e} = 67.2\,km/s$
Other Language