4. The distance between a planet and the sun is 3.2 x10^8 km. The distance of that sun with respect to the earth is 1.5 x10^10 km. Calculate the period of the planet. 5. A = 4i +2j + -k B = -i + -4j+-2k If vector A has a magnitude of 4.82 m and vector B has a magnitude of 5.4, calculate the angle between both vectors. A 3 kg object moves with a kinetic energy of 5.3 x10^3 J. Calculate the speed of its movement.