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Soaring Crane
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An electron (m = 9.11 x 10^-31 kg) is accelerating in the uniform field E (E = 1.85 x 10^4 N/C) between 2 parallel charged plates. The separation of the plates is 1.2 cm (.012 m). The electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive plate.
a.What speed does it leave the hole?
b.Show that gravitational force can be ignored.
a. I know that E = F/q, where F = ma.
Given: E = 1.85 x 10^4 N/C, r (or x) = .012 m, m = 9.11 x 10^-31 kg, but what is q?
Using mathematical definitions, I can solve for v.
E = ma/q, where a = Eq/m
v = x/t a = v/t
a*t = x/t
t = sqrt(x/a)
Then I can plug in x and t values for v = x/t. Correct?
b. I have no idea how to carry out this proof. Need help!
Thanks.
a.What speed does it leave the hole?
b.Show that gravitational force can be ignored.
a. I know that E = F/q, where F = ma.
Given: E = 1.85 x 10^4 N/C, r (or x) = .012 m, m = 9.11 x 10^-31 kg, but what is q?
Using mathematical definitions, I can solve for v.
E = ma/q, where a = Eq/m
v = x/t a = v/t
a*t = x/t
t = sqrt(x/a)
Then I can plug in x and t values for v = x/t. Correct?
b. I have no idea how to carry out this proof. Need help!
Thanks.