d) It re 4. A bus of mass 35000 kg moves at a constant speed and gives an output power of 175 kw. if the speed is 2.7 m/sec, calculate the friction force involved in this process if acceleration due to 9.00 . gravity is taken as 9.81 m/s2 a) 4.74 KN A6 KN 466.5 kN 4.83 KN 21 2