Coefficient of Restitution Calculator
coefficient of restitution calculator. Get instant, accurate results. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Manoj Kumar, Mathematics Educator
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Formula: e = relative speed after / relative speed before
Worked example — e=0.6
e = relative speed after / relative speed before
Ratio of relative speed after to before collision. e=1 perfectly elastic, e=0 perfectly inelastic.
Problem:Ball: v1=10, v2=0, v1 after=2, v2 after=8
Solution:e=(8-2)/(10-0)=0.6
Result:e=0.6
Material (rubber≈0.8, steel≈0.6, clay≈0), temperature, and impact speed. It is not truly constant but approximately so for moderate speeds.
e = (relative speed after collision) / (relative speed before collision) = |v2' - v1'| / |v1 - v2|. A value of 1 means no kinetic energy loss; a value of 0 means the objects stick together after impact.
Sports equipment design (tennis balls, golf balls, basketball standards), automotive crash testing, industrial machinery collision analysis, and physics research all rely on measuring the coefficient of restitution to characterize material behavior.
Reviewed for accuracy by Manoj Kumar, Mathematics Educator · Editorial policy
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