What is the speed of an electron that has been accelerated from rest through a potential difference (delta V) = +1000 V?  Use conservation of energy (delta K + delta U = 0).  Remember that delta U = q(deltaV)

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Chapter1: Units, Trigonometry. And Vectors
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What is the speed of an electron that has been accelerated from rest through a potential difference (delta V) = +1000 V?  Use conservation of energy (delta K + delta U = 0).  Remember that delta U = q(deltaV)

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Step 1

According to the energy conservation 

(1/2) * m * v^2 =q ΔV 

Now

v = √(2 * q * ΔV / m)

where v is the speed of the electron, q is its charge, ΔV is the potential difference it has been accelerated through, and m is its mass.

The charge of an electron is -1.60 x 10^-19 C, and its mass is 9.11 x 10^-31 kg.

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