For a planet having mass equal to the Earth but radius is one fourth of radius of the Earth, then escape velocity for this planet will be…………

For a planet having mass equal to the Earth but radius is one fourth o

1.	For a planet having mass equal to the Earth but radius is one fourth of radius of the Earth, then escape velocity for this planet will be…………
Answer» 11.2 km/s 22.4 km/s 3.6 km/s 44.8 km/s Solution :RADIUS of earth = 4 Radius of planet Escape velocity of planet `= sqrt(2(4R)G) = 2sqrt(2Rg)` `=2xx 11.2 = 22.4 km//s` (Escape velocity of earth = 11.2 `km s^(-1)`