The chewing muscle, the masseter, is one of the strongest in the human body. It

Question

The chewing muscle, the masseter, is one of the strongest in the human body. It is attached to the mandible (lower jawbone) The jawbone is pivoted about a socket just in front of the auditory canal. The forces acting on the jawbone are equivalent to those acting on the curved bar as shown in the figure. C is the force exerted against the jawbone by the food being chewed, T is the tension in the masseter, and R is the force exerted on the mandible by the socket. Find (a) T and (b) Rif you bite down on a piece of steak with a force of 51.7 N Neglect the weight of the jawbone. T N (plusminus + 2 N) R N(plusminus 2 N) Source: Serway and Faughn, College Physics, 5th edition, Problem 8.13 A 17, 8-kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable connected to the beam helps to support the light.

Explanation / Answer

W = 51.7 N

Fnet = Fc x (7.5 + 3.5) cm - T x 3.5 cm =0

T = 51.7 x 11/3.5 = 162.5 N

Hence, T = 162.5 N

F + R = T

R = T - F

R = 162.5 - 51.7 = 110.8 N

Hence, R = 110.8 N

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.