A train of weight, 3.7x106 N is moving at a speed of 40.8 m/s. Determine its Kinetic energy ? Physics Work and Energy Energy 1 Answer Donatello N. · Trevor Ryan. Oct 29, 2015 314,24MJ314,24MJ Explanation: E_k=1/2mv^2Ek=12mv2 =1/2(W/g)v^2=12(Wg)v2 here W is the weight of the train, so that we could calculate for its mass inserting the variables, =1/2((3,7xx10^6)/(9,8))(40,8)^2=12(3,7×1069,8)(40,8)2 =314,24MJ=314,24MJ Answer link Related questions How do matter and energy interact? Question #50ca2 Question #242cf Question #5038d Question #50391 What is potential energy? Question #d6576 Question #50cae Question #50cb2 Question #50cb6 See all questions in Energy Impact of this question 2399 views around the world You can reuse this answer Creative Commons License