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The kinetic energy of the rocket is (initial):-                                                           And the initial potential energy is :                                                           Thus total initial energy is given by :                                                                Further, it is given that 20 per cent of kinetic energy is lost. So the net initial energy...
Firstly, the potential energy of spaceship due to the sun is given by :                                                                        and the potential energy of spaceship due to mars is given by :                                                                        It is given that the spaceship is stationary so its kinetic energy is zero. Thus the total energy of spaceship is :    ...
A body will get stuck at the star's surface if the centrifugal force of star is less than the gravitational force. The gravitational force is given by :                                                          or                                                              The centrifugal force is given by :                                                            or                         ...
Height of satellite from earth's surface :     Gravitational potential is given by :                                                             or                                                        or                                                        Thus potential due to earth gravity is   .                          
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