Physics problem with a knee diagram... Help me start this pleeeease.?

by J0nB0n

Physics problem with a knee diagram... Help me start this pleeeease.?The figure shows the quadriceps and the patella tendons attached to the patella (the kneecap). If the tension T in each tendon is 1.00 kN, what is the magnitude and direction of the contact force exerted on the patella by the femur?

http://www.webassign.net/grr/chapter-04/fig-045.gif

- Pearlsawme
T cos 37 + T cos 80 = 0.7986 + 0.1736
= 0.9722 T
T sin 37 - T sin 37 = 0.6018 - 0.9848
= -0.383T acting down
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Resultant R =
T √ [0.9722 ^2 + 0.383^2 ]
1.0449 T.
= 1.0449 kN.
====================

tan θ = 0.338 / 0.9722
θ = 19.17 °
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