Calculate the contact force between the skis and the track

  • #1

Homework Statement


14.37 A 75-kg ski jumper starts his run in the position shown on the parabolic
track. The equation of the parabola is ##y = (12/225)x^2##, where x and y are in meters.
Neglecting friction, calculate the contact force between the skis and the track at O.

Fig P14_37.jpg


Homework Equations




The Attempt at a Solution


[/B]
At pont A (start of run):

##Vg_A=mg(12)##
##T_A=0##

At pont O:

##Vg_O = 0##
##T_O=1/2mv_O^2##

Something is missing?
Any hints how to continue?
 

Attachments

  • Fig P14_37.jpg
    Fig P14_37.jpg
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Answers and Replies

  • #2
BvU
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Something is missing?
Indeed ! Some relevant equations featuring the variables and given information !
 
  • #3
haruspex
Science Advisor
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how to continue?
So can you find the velocity at O?
What else do you need to know to figure out the force there?
 

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