- #1

awilliam_3

- 7

- 0

## Homework Statement

A uniform electric field has a magnitude E and is directed in the +x-direction. A negative (-) charged particle is placed in the electric field. Determine the direction of the force on the charge.

A) +x direction

B) -x direction

C) 45 degrees below the -x axis

D) -y direction

E) 45 degrees above the +x axis

F) +y direction

## Homework Equations

F = ma

## The Attempt at a Solution

Using the x- and y-axes, the electric field is in the -y-direction and the initial velocity of the electron is in the +x-direction and the initial velocity of the electron is in the +x-direction. The electric force on the electron is upward (in the +y-direction) since it has a negative charge and is constant because the field is uniform. Thus, the acceleration of the electron is constant and directed upward. Since the acceleration is in the +y-direction, the x-component of the velocity is constant.

Thus, I chose (E) for the answer.