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QUESTION

A student s head is bent over her physics book. Figure 6 shows that the head weighs 50.

A student ′s head is bent over her physics book. Figure 6 shows that the head weighs 50.0 N and is supported by the muscle force Fm exerted by the neck extensor muscles and by the contact force Fc exerted at the atlantooccipital joint. Given that the magnitude of Fm is 60.0N and is directed 35° below the horizontal, find (a) the

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