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Ramp with friction

  • Thread starter rechitzy
  • Start date
  • #1
21
0

Homework Statement



When mass M is at the position shown, it is sliding down the inclined part of a slide at a speed of 2.19 m/s. The mass stops a distance S2 = 2.5 m along the level part of the slide. The distance S1 = 1.07 m and the angle θ = 29.70°. Calculate the coefficient of kinetic friction for the mass on the surface

http://s876.photobucket.com/albums/ab327/rechitzy/?action=view&current=prob27a_MechEnWFriction.gif&newest=1


Homework Equations



E = K+U



The Attempt at a Solution



Don't even know where to start...
 
Last edited:

Answers and Replies

  • #2
ideasrule
Homework Helper
2,266
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You can use conservation of energy, taking into account the energy lost by friction.
 
  • #3
21
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ok i know what you are talking about but how do i do that?
 
  • #4
ideasrule
Homework Helper
2,266
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Initial energy (potential+kinetic), minus the energy lost by friction, is equal to final energy (potential+kinetic). Write that out in an equation as your first step.
 
  • #5
21
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Ok, would this be KE1+PE1-Efr=KE2+PE2?
 
  • #6
21
0
Thanks i already figured it out.
 

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