Find speed of rollercoaster on point on loop

  • Thread starter aeromat
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  • #1
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Homework Statement


1000kg rollercoaster starts from point A on a frictionless track with the profile shown below.


c) Determine the rollercoaster's speed at point B? <-- the point on the loop itself


Will it work if I apply Conservation of Energy, being:

from A, Ek is 0 (Starting point).

0 + (m)(g)(hA) = 1/2(m)(vB)^2 + (m)(g)(hB)?

Will this equation work, even though it is at a loop? See attachment for the picture.
 

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Answers and Replies

  • #2
Doc Al
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Will this equation work, even though it is at a loop?
Sure.
 
  • #3
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But how does that make sense though?
 
  • #4
Doc Al
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But how does that make sense though?
With no friction, mechanical energy is conserved. What are you thinking that doesn't seem to make sense?
 
  • #5
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and you can take zero potential at level of A so that mghA = 0
 

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