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Potential energy (two charges)
U = kq₁q₂/r
Where: U = potential energy (J), k = spring constant (N/m) / Coulomb constant, q₁ = charge 1 (C), q₂ = charge 2 (C), r = radius / distance (m)
Solved example
Given: k = 7, q_1 = 5, q_2 = 10, r = 4
Find: U (potential energy (J))
- Formula: U = k·q₁·q₂/r
- Substitute the values: U = 10·5·7/4
- Result: U = 87.5 J
Answer: U = 87.5 J
Calculator
How to calculate Potential energy (two charges)
- Write down the formula: U = kq₁q₂/r.
- Note the known values (k, q₁, q₂, r).
- Substitute them and simplify to find U.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Potential energy (two charges)?
The formula is U = kq₁q₂/r, where U = potential energy (J), k = spring constant (N/m) / Coulomb constant, q₁ = charge 1 (C), q₂ = charge 2 (C), r = radius / distance (m).
What is Potential energy (two charges) when k = 7, q_1 = 5, q_2 = 10, r = 4?
U = 87.5 J. Substitute the values into U = kq₁q₂/r and simplify.