Two neutron stars are separated by a distance of 1.0 1010 m. They each have a mass of 1.0 1030 kg and a radius of 1.0 105 m. They are initially at rest with respect to each other. As measured from that rest frame, how fast are they moving at the following positions?

a) Their separation has decreased to one-half its initial value. m/s

(b) They are about to collide. m/s

mistakes are ok

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

there are no components of a physical goal mentioned on the list of choices that you've provided.

gravitational energy

electrical energy

kinetic energy

ligh energy