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wormwoodsilver101
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Homework Statement
A small sphere with mass 5.00×10−7 kg and charge +6.00 μC is released from rest a distance of 0.400 m above a large horizontal insulating sheet of charge that has uniform surface charge density σ = +8.00 pC/m2.Using energy methods, calculate the speed of the sphere when it is
0.100 m above the sheet.
Homework Equations
V=integrate(E dl) from a to b
E=σ/2ε
The Attempt at a Solution
σql/2ε=0.5mv^2
(8*10^-12)(6*10^-6)(0.4-0.1)/2ε=0.5(5*10^-7)v^2
v=1.8m/s
But mastering physics keeps saying it is wrong
I don't know what did I did wrong
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