Fo = 1250 N 55° 75° F,

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter38: Refraction And Images Formed By Refraction
Section: Chapter Questions
Problem 70PQ: A Fill in the missing entries in Table P38.70. Table P38.70
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The upper leg muscle (quadriceps) exerts a force of 1250 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in Figure 6. Find the direction and magnitude of the force exerted by the kneecap on the upper leg bone (the femur).

 

Fo = 1250 N
55°
75°
Transcribed Image Text:Fo = 1250 N 55° 75°
Expert Solution
Step 1

The force exerted by the upper muscle is,

FQ=1250 N

The resultant force in the x-direction can be given as,

Fcosθ=FQcos55°+FQcos75°=1250 Ncos55°+1250 Ncos75°=1040.5 N

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