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Final Exam Review_ part 2

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					Final Exam Review, part 2

     Friday, December 12
                     6:15
• A 1500kg car drives around a flat 200-m-
  diameter circular track at 25m/s. What are
  the magnitude and direction of the net force
  on the car? What causes this force?
                     6:24
• The centers of a 10kg lead ball and a 100g
  lead ball are separated by 10cm. What
  gravitational force does each exert on the
  other?
                     7:10
• What magnitude of F2 causes the net torque
  on the rod to be zero?

              F2                   F1=20.0N


                                 450


               .5m          1m
                      9:48
• A 20 g ball of clay is thrown horizontally at 30
  m/s towards a 1.0 kg block and sticks to the
  block. The block is on a magic frictionless
  surface. What is the speed of the block and
  clay immediately after the clay hits?
                                  7:48
• Before                                 after



• V1i =20m/s         v2i = 0 vf we want to find
• pi=Mball*v1i+0=pf=(Mball + Mblock)vf
             M ball
 vf                       vi 
       M ball  M block 
    .2kg       m       m
             20  3.33
 .2  1. kg s        s
                 oscillators
• A massless spring has a spring constant of
  10.0N/m. It is hung vertically. Then a 250 g
  mass is hung from the spring. How far does it
  stretch?
• B) If the mass is made to oscillate vertically,
  what is its period?
              Mass on a spring
• k=10N/m, F =mg =k Δy
• Δy = mg/k = .250*9.8/10. = 0.245 m 24.5cm
    k
 
    m
        1    k   1 10.0 N / m
 f                          
     2 2    m 2   .250kg
 f  1.005s
              Final Exam
• Monday, December 15, 1:30-3:30pm HERE

				
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