A locomotive of total mass increases its speed uniformly from to in
PHYSICS · Subjective · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power
Problem
A locomotive of total mass 1.0×106kg increases its speed uniformly from 15ms−1 to 25ms−1 in 40s. The engine converts only 30% of the chemical energy of the fuel into the mechanical energy that appears as the locomotive’s kinetic energy. Calculate the amount of chemical energy that must be supplied by the fuel during this 40s interval. Express your answer in megajoules (MJ).