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ryan8642
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Homework Statement
A proton with an intial speed of 800,000m/s is brought to rest by an electric field.
What was the potential difference that stopped the proton.
Homework Equations
Ki + qvi = Kf + qvf
k=.5mv^2
The Attempt at a Solution
Voltage final = ?
vi = 800,000m/s
v2=0
q=1.60x10^-19
m=1.67x10^-27
ki=.5mv^2
=.5(1.67x10^-27)(800,000)
=6.68x10^-22j
Ki + qVi = Kf + qVf
Ki=-qVi
6.68x10^-22j=(-1.60x10^-19)Vi
-4.175x10^-3=Vi
^^^ is that answer correct?
Its seems weird cause Energy isn't really conserved :s
Homework Statement
Homework Equations
The Attempt at a Solution
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