College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 9, Problem 35PE
To determine
(a)
The force exerted by the lower teeth on the bullet.
To determine
(b)
The force on the joint.
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A person places his hand palm downward on a scale and pushes down on the scale until it reads (8.31x10^1) N. The triceps muscle is responsible for this arm extension force. Find the force (in N) exerted by the triceps muscle. The bottom of the triceps muscle is 2.50 cm to the left of the elbow joint, and the palm is pushing at approximately 35.0 cm to the right of the elbow joint. (please ignore the number 96 shown in the scale). Give your answer with three significant figures.
A person places his hand palm downward
on a scale and pushes down on the scale
until it reads 96.0 N. The triceps muscle is
responsible for this arm extension force.
Find the force exerted by the triceps
muscle. The bottom of the triceps muscle
is 2.50 cm to the left of the elbow joint,
and the palm is pushing at approximately
29.0 cm to the right of the elbow joint.
P
96.0 N
2.50 cm and Q = 29.0 cm.
where P =
Unlike most of the other muscles in our bodies, the masseter muscle in the jaw, as illustrated in as shown, is attached relatively far from the joint, enabling large forces to be exerted by the back teeth. (a) Using the information in the figure, calculate the force exerted by the lower teeth on the bullet. (b) Calculate the force on the joint.
Chapter 9 Solutions
College Physics
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