- #1

jisbon

- 476

- 30

- Homework Statement
- Ring of radius 10cm and charge of 3##\mu C## at the origin.

Ring axis aligned with z.

Electric potential along z is V=## \frac{kQ}{\sqrt{z^2+R^2}}##

Then another charge of -5##\mu C## and mass of 0.1kg released from the origin at u = 7m/s in k direction.

Find the velocity of q at z=3m

- Relevant Equations
- ##E = k\frac{\lambda a}{(x^2+a^2)^{3/2}}##

Okay, I am not even sure how to startr with this question. But here's my theory:

First I will need to the electric field produced by the ring using the formula:

##E = k\frac{\lambda a}{(x^2+a^2)^{3/2}}##

After finding out electric field produced by ring, am I supposed to find out the acceleration on the charge using ##a=\frac{eq}{m}## ? If so, the direction will be the k axis I assume?

If the above holds true, then I will proceed to use kinematics equation to solve for speed using ##v^2=u^2+2as## ? Since I have final displacement and acceleration (if I am correct)

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