hi all!(adsbygoogle = window.adsbygoogle || []).push({});

I am learning the derivation of the formula of the inertia force of reciprocating masses, which is a typical formula that I am sure all of you must know.

F=mrw^2{cosB+(cos2B)/n}

I know that the cosB term is called the 1st harmonic, and the cos2B term is the 2nd harmonic.

Also, I know that this is not an exact formula, since a approximation was made in the derivation. That, n>>l, right?

But I cannot see if without the assumption, what will be the relation?

I am told that there should be some higher order terms after mw^2{cosB+(cos2B)/n}. But I don't see what they are and how they are produced. Is that something like Taylor series is used in order to produce the higher order terms??

I am confused.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Inertia force of a reciprocating masses

**Physics Forums | Science Articles, Homework Help, Discussion**