a) Use the relationship between force and energy to develop an expression for the gravitational potential energy of a planet or star.
b) Explain in your own words why your result from part (a) makes sense.

a) The expression for gravitational potential energy of a planet or star is derived from the relationship between force and energy.
b) The result from part (a) makes sense because...
c) Gravitational potential energy of a planet or star can be calculated using the formula...
d) The explanation of the relationship between force and energy is justified by...