Answer:
or
.
Explanation:
<u>Given:</u>
- Charge on the particle at origin = Q.
- Mass of the moving charged particle,

- Charge on the moving charged particle,

- Distance of the moving charged particle from first at t = 0 time,

- Speed of the moving particle,

For the moving particle to circular motion, the electrostatic force between the two must be balanced by the centripetal force on the moving particle.
The electrostatic force on the moving particle due to the charge Q at origin is given by Coulomb's law as:

where,
is the Coulomb's constant having value 
The centripetal force on the moving particle due to particle at origin is given as:

For the two forces to be balanced,
Using the formula t=root of 2h/g then where h=28 and g=9.8 then substitute so the answer is 2.4seconds
The (more) speed an object has, the (lower) the potential energy and the (higher) the kinetic energy. (I believe that is correct but it’s been a while since I’ve done this)
Addition of 2vector gives you 1large vector quantity
False, he is a catcher, and he is in new york