A charge of +3.5 nC and a charge of +5.0 nC are separated by 40 cm. Find the equilibrium position for a -6.0 nC charge.

from charge.

Explanation:

Given

The magnitude of the first charge is  

The magnitude of the second charge is

charge must be placed in between the two charges to establish equilibrium

The electrostatic force is given by

Equilibrium will be established when force by both the charges balance out each other. Suppose is placed at a distance of cm from . So, we can write

Canceling similar terms

Thus, the equilibrium position is from charge.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.