Lesson 2

Question 1

What are the equations for rotating rigid objects?

Answer 1

~ V = rw
~ Lz = lw
~ I = Σi miri2
~ I = the moment of inertia
~ dL/dt = I (dw/dt) = Iα
~ ΣText = Iα = dL/dt

Question 2

What is the Inertia of a rigid rod?

Answer 2

Inertia of a rigid rod = 1/3mL2

Question 3

What are the Equations for conservation of angular momentum?

Answer 3

~ ΣText = dL/dt = 0
~ ΔLtot = 0
~Ltot = constant
~Iiwi = Ifwf