An electron is released from rest at a distance of 9.00 cm from a fixed proton. How fast will the electron be moving when it is 3.00 cm from the proton

the  speed of the electron at the given position is 106.2 m/s

Explanation:

Given;

initial position of the electron, r = 9 cm = 0.09 m

final position of the electron, r₂ = 3 cm = 0.03 m

let the speed of the electron at the given position = v

The initial potential energy of the electron is calculated as;

When the electron is 3 cm from the proton, the final potential energy of the electron is calculated as;

Apply the principle of conservation of energy;

ΔK.E = ΔU

Therefore, the  speed of the electron at the given position is 106.2 m/s

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