# Shared Flashcard Set

## Details

Dynamics Ch. 12 and 13
asd
14
Engineering
10/07/2013

Term
 A particle will have an acceleration proportional to the ________ acting on it and in the ________.
Definition
 magnitude of the resultant force; direction of the resultant forceNewton's 2nd Law
Term
 The resultant of the forces acting on a particle is equal to the rate of change of __________.
Definition
 linear momentum of the particle
Term
 The sum of moments about O of the forces acting on a particle is equal to ___________ of the particle about O.
Definition
 the rate of change of angular momentum
Term
 Acceleration ______ be evaluated with respect to a __________, one that is not accelerating or rotating
Definition
 must; Newtonian frame of reference
Term
 Linear Momentum of a particle_______. If mass is constant then _________.
Definition
 ∑F = m * dv/dt ; ∑F = d/dt (mv)
Term
 If the resultant of all forces is _____ then the particle is in _______ equilibrium.
Definition
 zero; static
Term
 Since ∑F = ma we can rearrange this as  ∑F - ma = 0. The negative vector -ma is called ______. Now the equation represents _________.
Definition
 inertia vector; dynamic equilibrium
Term
 Solving problems in kinetics of particles(or rigid bodies we need to draw 2 diagrams...
Definition
 FBD (shows all forces acting on the particle) KD (showing negative of inertia vector, ma)
Term
 _________ or ________ of the particle about O is defined as the cross product of position vector r of the particle and its linear momentum vector L.
Definition
 Moment of linear momentum; angular momentum Ho Ho = r x L = r x mV
Term
 Derivative of angular momentum with respect to time
Definition
 [image]
Term
 From Newton's second law that the ________ about O of _________ on the particle is equal to the _____________ of the particle about O[image].
Definition
 sum of the moments; all the forces acting; rate of change of the angular momentum [image]
Term
 When the only force acting on a particle is directed toward or away from a fixed point O, the particle is said to be.....
Definition
 moving under a central force
Term
 Since the LOA of the central force passes thru point O then the moment due to this force about point O is _______.  [image]
Definition
 zero
Term
 Work of the force of gravity
Definition
 W1->2 = -Weight( y2 - y1 )
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