Coulombs law, vectors and charge-HELP

AI Thread Summary
The discussion focuses on applying Coulomb's law to calculate the net force on three positive charges arranged at the corners of an equilateral triangle. Each charge is 15.0 µC, and the side length of the triangle is 16.5 cm. The primary equation used is F = kq1q2/r^2, which helps determine the force between each pair of charges. The challenge lies in calculating the resultant direction of the forces acting on each particle, which are symmetrical due to the configuration. Understanding vector addition is essential for finding the net force on each charge.
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coulombs law, vectors and charge---HELP!

Homework Statement


Three positive particles of charges 15.0 µC are located at the corners of an equilateral triangle of side d = 16.5 cm (Fig. 16-38). Calculate the magnitude and direction of the net force on each particle.
(Q1 is at the top of the triangle with Q2 on the bottom left and Q3 on the bottom right)

Homework Equations


F=kq1q2/r^2

The Attempt at a Solution


?
 
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It should be easy to work out the magnitude of force on each particle due to another since for all of them it will be the same. All you have to do is work out the resultant direction of the force.
 

Thread 'Errors and significant figures'

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Thread 'A cylinder connected to a hanging mass'

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Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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