Question

Why is the equation for Newton's Law of Gravitation negative?

a. The negative sign indicates the force is made by mass
b. The negative sign cancels out the negative sign of the gravitational constant
c. The negative sign indicates the strength of the force
d. The negative sign indicates that the force is always attractive (THIS ANSWER IS CORRECT)

Answer 1

gravitational force of attraction between two positive mask or two negative mass and repulsive between one negative into positive minus negative sign only appears when the force is acting in the opposite direction when considered the direction.

Answer 2

D) The negative sign indicated the force is always attractive