Point Kinetics Flashcards
What are the three types of methods?
F/M/A in derived / integrated form
Energy Methods
What is formula for linear momentum?
G = m . v
What is Newtons second law?
dG/dT = F
When are Newtons axioms valid?
When dealing with absolute quantities in Inertial system
What are forces paralled to?
Change in momentum and velocity
What is formula for moments?
\sum M = r x \sum F
What is formula for angular momentum?
H_a = r_{P|A} x (m . v_p,abs)
What coordinate system should you represent angular momentum in?
Any
What is the formula for change in angular momentum?
\delta H_a = v_{P_A} x mv_{A,abs} + r_{P|A} x (ma_{p,abs}/ . \sum F)
When is sum of moments equal to rate of change of angular momentum?
When reference pint is fixed
What is formula for relative angular momentum?
H_A,rel = r_{P|A} x m v_{P|A}
What is the formula relating sum of moments and change of relative angular momentum?
\sum M_a = d H_{a,rel} + r_{P|A} x m_a{A,abs}
What is the integrated form of linear momentum?
G_1 + \sum F_i dt = G_2
