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burnst14
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Homework Statement
If an electron travels 0.210 m from an electron gun to a TV screen in 29.7 ns, what voltage was used to accelerate it? (Note that the voltage you obtain here is lower than actually used in TVs to avoid the necessity of relativistic corrections.)
Homework Equations
Kinematics equations, but past that, I don't have one.
The Attempt at a Solution
I have calculated the acceleration and change in PE, as prompted by WebAssign, but I only have an equation for ΔV. I tried assuming the voltage at the TV screen was zero, but the answer was incorrect.
a = 4.76E14 m/s2
vfinal = 14,141,414,14 m/s
ΔPE = -ΔKE = -6.44E-24 J
ΔV = 4.03E-5 V