Lecture 18 Kinetics Flashcards
1
Q
Equation for resultant force acting on a body
A
sum F = m a
2
Q
Equation for resultant moment
A
Sum Mg = Ig alpha
where Mg is the resultant moment Ig the mass moment of inertia alpha the angular acceleration
3
Q
Linear momentum =
A
L = mv
4
Q
L. =
A
d/dt (mv) = ma = sum F
5
Q
Angular momentum of a particle is
A
moment of the linear momentum
6
Q
symbol of angular momentum =
A
H0 = r x mv
7
Q
Rate of change of angular momentum =
A
H0. = r x mv. = sum of moments
8
Q
sum of moments relationship with sum of forces
A
Sum of M0 = r x sum of Forces
9
Q
sum of moment about an arbitrary point
A
sum MP = sum rate of change of angular momentum + rhoG (dist from arbitrary point to centre of mass) x m ag
10
Q
Sum of moments about an arbitrary point in a planar system
A
sum MP = IG alpha + rhoG x maG
