(a) Calculate the rotational kinetic energy (in J) of Mars on its axis. (Assume its mass to be 6.58 ✕ 1023 kg, the period about its axis to be 24.6 h, and its diameter to be 6790 km.) J (b) What is the rotational kinetic energy (in J) of Mars in its orbit around the Sun? (Assume its distance from the sun to be 2.28 ✕ 108 km and its period about the sun to be 687 days.) J
