What is the kinetic energy of a spacecraft when moving at a speed of 7.8 km / s if it has a mass of 6.6 tons?

m = 6.6 t = 6600 kg;

v = 7.8 km / s = 7800 m / s;

Ek -?

Let’s calculate the kinetic energy by the formula: Ek = (mv ^ 2) / 2, where m is the mass of the ship, v ^ 2 is the speed of the ship squared.

Ek = (6600 kg * (7800 m / s) ^ 2) / 2 = 200 772 000 000 J = 200772 MJ.

Answer: the kinetic energy of the spacecraft is 200,772 MJ.