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296121
Exam 2
Descrição
Mapa Mental sobre Exam 2, criado por cspicer em 22-10-2013.
Mapa Mental por
cspicer
, atualizado more than 1 year ago
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Criado por
cspicer
mais de 10 anos atrás
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Resumo de Recurso
Exam 2
Chapter 6: Work and Energy
Chapter 7: Momentum, Impulse, Collisons
Chapter 8: Rotational Motion
Angular position = theta
dimensionless
units= radians
arc length = S
radius = r
omega= angular velocity
alpha= angular acceleration
Tangential acceleration = linear acceleration
m/s^2
At= alpha x radius
Kinematic Equations
Omega f = Omega i + alpha x change in time
theta f = theta i + omega i x change in t + 1/2 alpha times change in time squared
Theta f - theta i = change in theta = Omega i times change in t + 1/2 alpha times change in time squared
Momentum = p
p= m X v
Units: kg x m/s
Impulse= avg Force x change in time
Impulse = change in momentum
Conservation of Linear motion
P total i = P f total
Inelastic Collisions
KE is not conserved
Elastic Collisions
KE i total = KE f total
P i total = P f total
Center of Mass
X cm= sum of m1 X x1 + m2 X x2..... / m1 + m2....
Ycm = sum of m1 x y1 + m2 x y2...... / m1+m2...
Work= force x displacement
Work= force x displacement x cos(alpha)
Work Energy Theorem
Work is the change in kinetic energy
Units: Joules
KE= 1/2 x mass x velocity^2
KE total i = KE total f
PE total i = PE total f
KEi + PE i = KEf + PE f
Uniform Circ Motion
Aceleration is not constant
Ac= V^2/radius
Cannot be reduced to one dimension
Velocity is not constant
V=circumference / T
T=Period
T= Tf-Ti/#rotations
Centipetal Force
Mass x Centripetal acceleration
Always center seeking
Vertical Circular Motion
Tension (bottom) = m [(v^2/r)+g]
Minimum velocity= sqrt(gr)
Tension (top)= m[(v^2/r)+g]
Newton's Law of Gravitation
Fgrav= (Gm1m2)/r^2
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