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CHAPTER 8 Linear Momentum - Coggle Diagram
CHAPTER 8 Linear Momentum
8-2 Conservation of Momentum
can derived from Newton's Law
momentum is constant since the internal forces are equal and opposite
m1u1+m2u2=m1v1+m2v2
momentum does not change
8-10 Systems of Variable Mass; Rocket Propulsion
applying Newton's second law
eg situation:conveyor bel
rocket propulsion
8-4 Conservation of Energy and Momentum in Collisions
Momentum is conserved in all collisions.
inelastic momentum
elastic momentum
8-1 Momentum and Its Relation to Force
momentum,p=mv
can be shown using Newton's second law
change of momentum,∑F=dp/dt
8-3 Collisions and Impulse
J= F dt
8-7 Collisions in Two or Three Dimensions
Conservation of energy and momentum can also be used to analyze collisions in two or three dimensions,
8-9 Center of Mass and Translational Motion
macm=Fext
the center of mass of a system of particles (or objects) with total mass M moves like a single particle of mass M acted upon by the same net external force
eg situation: two-stage rocket
8-5 Elastic Collisions in One Dimension
8-8 Center of Mass (CM)
Xcm=(maxa +mbxb)/(ma+mb)
ma+mb=M
three particles in 2D
in a thin rod
in a L-shaped flat object
The center of gravity is the point at which the gravitational force can be considered to act. It is the same as the center of mass as long as the gravitational force does not vary among different parts of the object.
8-6 Inelastic Collisions
With inelastic collisions, some of the initial kinetic energy is lost to thermal or potential energy.