AP EAPCET 12 July 2022 Shift 2 Paper

An experimental train uses 1g of nuclear material to run. 90% of the produced energy is wasted to overcome the frictional force between the wheels and the track. If the weight of each coach is 18 ton (18000kg) and it runs at a speed of 100ms−1, the number of coaches the engine can drag at a time is
(Speed of light in vacuum is =3×108ms−1 )