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Three 6.8 micro coulomb charges are arranged at the corners of a an equilateral triangle with...

Three 6.8 micro coulomb charges are arranged at the corners of a an equilateral triangle with sides of length 0.3 meters. They are held in place initially. The charges have a mass of 10 grams. One side of the triangle is on the horizontal axis.

Find :

a) size of the force, in Newtons, acting on the charge at the top of the triangle due to the other two charges

b) the direction of the force, in degrees, as measured counter clockwise from the horizontal axis pointing towards the right, acting on the top charge.

c) the acceleration of the top charge at time equals zero, it were suddenly allowed to move. Using these new values of charge,8.7 micro coulombs, and length of sides of triangle,0.4 meters, what is the acceleration of the upper charge?

d) the direction of this acceleration?

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