question_answer

  A car weighing 1200 kg is uniformly accelerated from rest and covers a distance of 40 m in 5 s. Calculate the work done by the engine of car during this time. What is the final kinetic energy of car? 

Answer:

   Here, m =1200 kg, u =0, s = 40 m, t = 5 s W=Fs = mas From, W = mas From KE will be equal to the work done by the engine.