Two stars are orbiting each other in outer space. If they gradually move so that they end up three times farther apart than they were originally, the new gravitational force on them will be .

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

What properties of a moving object are used in determining the object's energy of motion

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost