what is the minimum energy required to launch a 1500kg satellite from the earth's surface to an altitude of 320km. (radius of earth=6.4*10^6m and mass of the earth=6*10^24kg)
The minimum energy required will be
E = total energy of satellite in orbit − total (potential) energy on Earth’s surface
or
E = (K.E. + P.E.) − P.E.
or
so,
thus,
E = 4.9 × 1010 J