Derive the differential equation(s) describing the given physical situation. (a) Use pa...

Derive the differential equation(s) describing the given physical situation.

(a) Use part (b) of Problem 3 to find the differential equation for r if the resistance to the falling satellite is proportional to its instantaneous velocity.

(b) Near the surface of the earth, use the approximation to show that the differential equation in part (a) reduces to the equation derived in Problem 1.

Problem 3: