In order for a spacecraft mission using a propulsion system to be successful, the sum of three forces, 1) Earth's gravity, 2) the Sun's gravity, and 3) the Sun's light pressure, must be a net force in the desired direction of travel.

answer: b.

explanation:

force tends to be low and long diustance masses are high

c) power lifting, will be your answer.

,

deku ❤

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y