Exam 2

Exam 2

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

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	Created by cspicer over 10 years ago