Where to find the cheapest Frankfurt-Munich train?

Find the kinetic energy of the train? Please help me....?

• A train with a total mass of 4 × 10^6 kg (4×10^9 g) rises 535 m while traveling a distance of 50 km a tan average speed of 17 km/h (4.72 m/s). The frictional force is 0.8 percent of the weight. 1) Find the kinetic energy of the train. The acceleration of gravity is 9.81 m/s^2 .Answer in units of MJ 2) Find the total change in its potential energy. Answer in units of J 3) Find the energy dissipated by friction. Answer in units of J 4) Find the power output of the train’s engines. Answer in units of MW

• Answer:

  1. Kinetic energy is (1/2)mv^2. 2. PE = mgh where h = vertical distance. 3. Work = F * d. 4. The engines had to account for the energy in 2 and the energy in 3, over however much time it takes to travel 50 km at 4.72 m/sec. Power = energy / time. In every case, it's just plugging in numbers which you are given.