Physics, 03.03.2021 21:30 bbyniah123
A train backs up from an initial velocity of -4.0 m/s and an acceleration of -0.27 m/s^2. What is the train's velocity after 17 s?
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What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential
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Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.
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Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.
Answers: 2
A train backs up from an initial velocity of -4.0 m/s and an acceleration of -0.27 m/s^2. What is th...
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