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Net electrostatic force on C is 24.2× Newtons.

Explanation: Coulomb's Law is used to determine Electrostatic Force. Its formula is:

F = k.

where:

k is electrostatic constant (k = 8.987× Nm²/C²);

q is the charge of the object in Coulumb;

r is the distance between charges;

The net force is the sum of all the forces acting on C, so:

Force B on C:

They are both positive, so there is a relpusive force acting between them on the y-axis.

N

Force D on C:

There is an atractive force between them on the x-axis.

N

Force A on C:

First, find the distance between objects:

The distance is a diagonal line that divides the rectangle into a right triangle. Distance is square of the hypotenuse .

and hypotenuse: r = m

There is an atractive force between charges, but there are components of the force in x- and y-axis. So, because of that, force will be:

.sinα + cosα

The trigonometric relations is taken from the rectangle:

sinα =

cosα =

cosα = = 0.17

sinα = = 0.072

0.17î + 0.072^j

Now, sum up all the terms in its respective axis:

X: 0.1714

Y: = 0.1723

These forms another right triangle, whose hypotenuse is the net electrostatic force:

N

The net electrostatic force acting on C has magnitude N.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y