An electric field from a charge has a magnitude of 4.5 x 10^4 N/C at a certain location that points outward. If another charge with a magnitude of -2.0 x 10^-6 C
is brought near it, what is the strength of the electrostatic force that acts on this
charge and how do the two charges behave?
0.09 N; repel each other
-0.09 N; attract each other
-2.3 N; repel each other
2.3 N; attract each other

4.5 x 10^4 x -2 x 10^-6 = -0.09N

Explanation:

-0.09N

To develop this problem it is necessary to apply the concepts related to conservation of the Moment and the cinematic equations of movement description. By definition we know that the conservation of the moment is given by

Where,

Mass

Velocity

From the kinematic equations of motion we know that displacement as a function of acceleration (in this case gravity) is given by,

Where h is the height, g the gravity and t the time,

The horizontal velocity would be given as,

Replacing in our first equation we have that

Solving for

Therefore the apple had 332g.