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Physics / College Physics 1 / Chapter 9 / Problem 28

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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Solved: The upper leg muscle (quadriceps) exerts a force

Chapter 9, Problem 28

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QUESTION:

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 \(9.38\). Find the direction and magnitude of the force exerted by the kneecap on the upper leg bone (the femur).

Figure \(9.38\) The knee joint works like a hinge to bend and straighten the lower leg. It permits a person to sit, stand, and pivot.

Equation Transcription:

$1250\ N$

$9.38$

Text Transcription:

1250 N

9.38

Questions & Answers

QUESTION:

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 \(9.38\). Find the direction and magnitude of the force exerted by the kneecap on the upper leg bone (the femur).

Figure \(9.38\) The knee joint works like a hinge to bend and straighten the lower leg. It permits a person to sit, stand, and pivot.

Equation Transcription:

$1250\ N$

$9.38$

Text Transcription:

1250 N

9.38

ANSWER:

Step 1 of 4

Force exerted by the upper leg muscles:

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