Answer:
The charge on the dust particle is
Explanation:
From the question we are told that
The length is
The width is
The charge is
The mass suspended in mid-air is
Generally the electric field on the carpet is mathematically represented as
Where is the permittivity of free space with value
substituting values
Generally the electric force keeping the dust particle on the air equal to the force of gravity acting on the particles
=>
=>
=>
=>
Answer
B. 3m/s
Why?
F=ma So F=(15)(8)
Make F=120
Now you just plug it in
120=40a
Your goal is to get the “a” by itself so you divide both side by 40 and you will get a=3