Dynamics

Equivalent mass

reduced mass (mass, being at distance r from rotation axis, brings moment of inertia equal to moment of inertia of whole solid relatively the same axis)

m_eq =

		x
μg
mg
g
kg
q
t
u
pood
lb

moment of inertia of solid

J =

kg·m²

		x
kg·m²

distance from rotation axis to reduced mass

r =

		x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd

1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"