Answer:

Explanation:
Additional information:
<em>The ball has charge </em>
<em>, and the ring has positive charge </em>
<em> distributed uniformly along its circumference. </em>
The electric field at distance
along the z-axis due to the charged ring is

Therefore, the force on the ball with charge
is


and according to Newton's second law

substituting
we get:

rearranging we get:

Now we use the approximation that
<em>(we use this approximation instead of the original </em>
<em> since </em>
<em>, our assumption still holds )</em>
and get


Now the last equation looks like a Simple Harmonic Equation

where

is the frequency of oscillation. Applying this to our equation we get:


<h2><em>What two terms are sometimes used to indicate opposite directions from a point?</em></h2>
- <em>The terms <u>positive and negative</u> can be useful when giving opposite directions from a reference point.</em>
<em>hope </em><em>it</em><em> helps</em>
<em>#</em><em>c</em><em>a</em><em>r</em><em>r</em><em>y</em><em> </em><em>on</em><em> learning</em>
Answer:
2 revolutions
Explanation:
Assume that when she runs off the edge of the 8.3m high cliff, her vertical speed is 0. So gravitational acceleration g = 9.8m/s2 is the only thing that makes her fall down. So we can use the following equation of motion to calculate the time it takes for her to fall down:

where s = 8.3 m is the distance that she falls, t is the time it takes to fall, which is what we are looking for


Since she rotates with an average angular speed of 1.6rev/s. The number of revolutions she would make within 1.3s is
