The amount of a rocket's thrust affect its trajectory because this thrust help the rocket to move against the gravity of the earth. More force in the form of thrust is needed by orbiting spacecraft to escape its orbit because the orbit does not allow the orbiting spacecraft to escape so for that force is needed to to against its orbit. First, we need to escape from the gravity of earth then go towards the mars. after entering the gravity of mass, we used a force which helps in safe landing on the mars.
