What is the net charge of a metal ball if there are 21,749 extra electrons in it?

Explanation:

Given that,

Number of extra electrons, n = 21749

We need to find the net charge on the metal ball. Let Q is the net charge.

We know that the charge on an electron is

To find the net charge if there are n number of extra electrons is :

Q = n × q

So, the net charge on the metal ball is . Hence, this is the required solution.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2