Asatellite moves around the earth in a circular orbit of radius r.

a. what is the speed v0 of the satellite in this orbit?

b. suddenly, an explosion breaks the satellite into two pieces, with masses m and 4m. immediately after the explosion, the smaller piece of mass m is stationary with respect to the earth and falls directly toward the earth. what is the speed v of the larger piece immediately after the explosion?

c. because of the increase in its speed, this larger piece now moves in a new elliptical orbit. find its distance away from the center of the earth when it reaches the other end of the ellipse. (hint: you will need to consider angular momentum).