**Task:**

Consider a simple model for a rocket launched from the surface of the Earth. A better expression for a rocket’s position measured from the center of the Earth is given by:

where R_{E} is the radius of the Earth (6.38 ✕ 10^{6}m) and g is the constant acceleration

of an object in free fall near the Earth’s surface (9.81 m/s^{2}). Continue reading