Afreight train consists of 3 engines at the front, followed by 32 rail cars. both the engines and rail cars have the same mass of 638,394 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 749,869 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 train at 0.035 meters/second2. what is the magnitude of the force in newtons in the coupling between the engine and the first rail car?
Answers: 3
Physics, 21.06.2019 13:40, hannahgracew12
The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions
Answers: 2
Physics, 22.06.2019 05:30, jalexus
Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue
Answers: 2
Afreight train consists of 3 engines at the front, followed by 32 rail cars. both the engines and ra...
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