Physics, 09.10.2019 16:30, torresnoemi899
16. a freight train consists of two 8.00×105 -kg engines and 45 cars with average masses of 5.50×105 kg . (a) what force must each engine exert backward on the track to accelerate the train at a rate of 5.00×10−2 m /s 2 if the force of friction is 7.50×105 n , 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 magnitude of 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?
Answers: 1
Physics, 21.06.2019 23:50, BrainzOli7408
Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?
Answers: 3
Physics, 22.06.2019 00:30, sophiaa23
Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?
Answers: 1
Physics, 22.06.2019 03:00, babysune01
Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law
Answers: 2
16. a freight train consists of two 8.00×105 -kg engines and 45 cars with average masses of 5.50×105...
English, 25.11.2019 09:31
English, 25.11.2019 09:31