Which statement is true about gravitational forces? a. only large masses exert a gravitational force on small masses. b. only masses of equal size exert a gravitational force on each other. c. every mass exerts a gravitational force on every other mass. d. only moving masses exert a gravitational force on stationary masses.

C. Every mass exerts a gravitational force on every other mass.

Explanation:

Gravitational force is one of the four fundamental forces of nature. It is the force that binds together all the object in the universe. This force is exerted by all the object having mass on another objects having mass. It doesn't matter whether the mass is less or more. With change in mass the amount of force will vary but the gravitational force will still be acting on everything having mass.

The gravitational force between two objects of mass m₁ and m₂ separated by a distance r is given as:

G = Universal gravitational constant

it about 600 mph from what i calculated

we need to know the time interval during which the force acts. impulse of force = momentum change