# Find the coulomb force on a point charge

Calculate the Coulomb force on q1 (q1 on left, q2 in the middle, q3 on the right). Choose forces to the right be positive and forces to the left negative. Assume q1 = 1.51 C, q2 = 6.24 C and q3 = -2.22 C. r1 = 2.87 cm (distance between q1 and q2) and r2 = 1.88 cm (distance between q2 and q3).

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Electrostatic Forces - 3 Charges I

Calculate the Coulomb force on q1, as seen in the figure below. Choose forces to the right be positive and forces to the left negative.

Solution:

There are two forces acting on q1 - one is the repulsive force from q2 (F12 - force on q1 due to q2) and the ...

#### Solution Summary

In this exercise, three point charges are placed in a straight line. The coulomb force on one of the point charge due to the other two is calculated and the direction is also determined.