Calculate the x-component of the electric field produced by the charge distribution Q at points on the positive x-axis where x>a. Express your answer in terms some or all of the variables Q, a, x, r, and constant k.

Explanation:

From the image attached below:

It is required to determine the electric field because of the line charge distribution of positive charge distributed uniformly from x = 0 to x = a at point x from O;

where x > a

Assume we chose an element dy at a distance from the point.

Then, the change on

The electric field due to this dy length is

Thus, the total electric field

Hence, the electric field  

15.3 cos 65 degrees trig

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.