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Motional EMF

  • Thread starter Robb
  • Start date
  • #1
225
8

Homework Statement


upload_2016-4-17_19-1-20.png


Homework Equations


upload_2016-4-17_19-1-38.png


The Attempt at a Solution



Kinetic Energy + Potential energy=0

1/2mv^2 = mgcos(20)
100v^2 = 1.96cos(20)
v^2 = .0184
v = .136 m/s

No idea if this is correct or if I should proceed with energy considerations. Please advise.
 

Answers and Replies

  • #2
robphy
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Under the influence of gravity and the normal force of the incline, the resulting motion is not at constant velocity. Right?

There must be an additional force somewhere to balance the forces.
So, you are missing something.
Is there anything else given in the problem that can be used?
 
  • #3
225
8
Thanks for the response. I got help in class last night!
 

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