A freight train consists of two kg 1000.8 4 − × engines and 45 cars with average masses of kg 1050.5 4 × . (a) What force must each engine exert backward on the track to accelerate the train at a rate of 2 –2 m/s 10.005 × if the force of friction is N 1050.7 5× , assuming the engines exert identical forces? This is not a large frictional force for such a massive system. Rolling friction for trains is small, and consequently trains are very energy-efficient transportation systems. (b) What is the force in the coupling between the 37th and 38th cars (this is the force each exerts on the other), assuming all cars have the same mass and that friction is evenly distributed among all of the cars and engines?
A freight train consists of two kg 1000.8 4 − × engines and 45 cars with...
A freight train consists of 4 engines at the front, followed by 30 rail cars. Both the engines and rail cars have the same mass of 722655 kilograms each. Each engine exerts the same force backward on the track to push the train forward. The total force of friction on the entire train is 698119 Newtons and is evenly distributed among all of the cars and engines. Even with this friction present, the train engines are able to accelerate the...
A toy freight train consists of an engine and three identical cars. The train is moving to the right at constant speed along a straight, level track. Three spring scales are used to connect the cars as follows: spring scale A is located between the engine and the first car; scale B is between the first and second cars; scale C is between the second and third cars. (a) If air resistance and friction are negligible, what are the relative...
Your old toy train from pre-school days consists of three cars: M_1 = 0.4 kg. M_2 = 0.4 kg, and M_3 = 0.1 kg. You pull the cars with a force F = 5.0 N (red arrow in the picture). The coefficient of kinetic (rolling) friction between all three cars and the ground is mu_k = 0.14. What is the difference in the tensions between the two ropes, F_TA - F_Tb? Give your answer in Newtons to at least three...