30. find the vector v with the given magnitude and the same direction as u.
||v|| = 3
u...
Physics, 18.12.2019 01:31 scottmichetti
30. find the vector v with the given magnitude and the same direction as u.
||v|| = 3
u = (4,-4)
Answers: 1
Physics, 21.06.2019 23:00
Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?
Answers: 1
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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
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Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c
Answers: 1
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