question_answer

A rocket is fired vertically from the surface of mars with a speed of 2 km/s. If 20% of its initial energy is lost due to martian atmosphere resistance, how far (in km) will the rocket go from the surface of mars before returning to it? Mass of mars\[=6.4\times {{10}^{23}}kg\], radius of mars =3395 km, \[G=6.67\times {{10}^{-11}}N{{m}^{2}}/k{{g}^{2}}.\]

Answer:

1655