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I'm getting pretty frustrated with this equation, and I'm not sure what I'm really doing. I've gone to the teacher for help, but as soon as I left school and came home, I've drawn a blank about what he told me..
"At a point in Earth's atmosphere, the electric field is 150 N/C downward and the gravitational field is 9.80 N/kg downward.
a) Determine the electric force on a proton (p+) placed at this point.
b) Determine the gravitational force on the proton at this point. The proton has a mass of 1.67 x 10-27 kg."
For a), I'm pretty sure you use the formula:
E = Fe/q, and then manipulate it to find Fe, right?
I tried doing this:
Fe = q * E
Fe = 9.80 N/kg * 150 N/C
I get Fe = 1470 N, when in the back of the textbook it says I should get 2.40 x 10-17 N
So I'm not getting the answer that it says in the textbook. I was wondering if I did something wrong with 'q', because isn't that the charge, which should be in coulombs? Am I supposed to use the gravitational field and the mass of the proton to find the charge?
I also tried this:
Fe = (1.67 x 10-27 * 9.80 N/kg) * 150 N/C
and I got Fe = 2.50 x 10-24 N
Still the wrong answer.
Maybe I'm entering it wrong into my calculator?
As for b), I was told to use:
g = Fg/m, then manipulate it to this:
Fg = mg
Fg = 1.67 x 10-27 * 9.80 N/kg
Fg = 1.64 x 10-26 N
which is right, so I don't really know why I typed this all down! Haha
"At a point in Earth's atmosphere, the electric field is 150 N/C downward and the gravitational field is 9.80 N/kg downward.
a) Determine the electric force on a proton (p+) placed at this point.
b) Determine the gravitational force on the proton at this point. The proton has a mass of 1.67 x 10-27 kg."
For a), I'm pretty sure you use the formula:
E = Fe/q, and then manipulate it to find Fe, right?
I tried doing this:
Fe = q * E
Fe = 9.80 N/kg * 150 N/C
I get Fe = 1470 N, when in the back of the textbook it says I should get 2.40 x 10-17 N
So I'm not getting the answer that it says in the textbook. I was wondering if I did something wrong with 'q', because isn't that the charge, which should be in coulombs? Am I supposed to use the gravitational field and the mass of the proton to find the charge?
I also tried this:
Fe = (1.67 x 10-27 * 9.80 N/kg) * 150 N/C
and I got Fe = 2.50 x 10-24 N
Still the wrong answer.
Maybe I'm entering it wrong into my calculator?
As for b), I was told to use:
g = Fg/m, then manipulate it to this:
Fg = mg
Fg = 1.67 x 10-27 * 9.80 N/kg
Fg = 1.64 x 10-26 N
which is right, so I don't really know why I typed this all down! Haha
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