In the figure below, the biceps muscle exerts a force supporting a perpendicular forearm and a book. Suppose we replace the book with an elastic exercise rope that obeys Hooke's Law. Assume its force constant k = 453 N/m. Triceps muscle Biceps ´muscle PHYSICS m, = 4.3 kg CG Fe m, = 3.7 kg Wo CG 4.0 cm W. 16 cm- - 38 cm. (a) How much is the rope stretched (past equilibrium) to provide the same force w, as before the book was replaced? Assume the rope is held in the hand at the same location as the book. (Enter your answer in cm.) cm (b) What force (in N) is on the biceps muscle if the exercise rope is pulled straight up so that the forearm makes an angle of 18° with the horizontal? Assume the biceps musde is still perpendicular to the forearm. (Assume the same stretch in the rope as part (a). Enter the magnitude.) N

In the figure below, the biceps muscle exerts a force supporting a perpendicular forearm and a book. Suppose we replace the book with an elastic exercise rope that obeys Hooke's Law. Assume its force constant k = 453 N/m. Triceps muscle Biceps ´muscle PHYSICS m, = 4.3 kg CG Fe m, = 3.7 kg Wo CG 4.0 cm W. 16 cm- - 38 cm. (a) How much is the rope stretched (past equilibrium) to provide the same force w, as before the book was replaced? Assume the rope is held in the hand at the same location as the book. (Enter your answer in cm.) cm (b) What force (in N) is on the biceps muscle if the exercise rope is pulled straight up so that the forearm makes an angle of 18° with the horizontal? Assume the biceps musde is still perpendicular to the forearm. (Assume the same stretch in the rope as part (a). Enter the magnitude.) N

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

In the figure below, the biceps muscle exerts a force supporting a perpendicular forearm and a book. Suppose we replace the book with an
elastic exercise rope that obeys Hooke's Law. Assume its force constant k = 453 N/m.
Triceps
muscle
Biceps
U muscle
PHYSICS
m, = 4.3 kg
CG
FE
m, = 3.7 kg
Wo
CG
4.0 cml
Wa
16 cm
38 cm
(a) How much is the rope stretched (past equilibrium) to provide the same force w, as before the book was replaced? Assume the rope is
held in the hand at the same location as the book. (Enter your answer in cm.)
|cm
(b) What force (in N) is on the biceps muscle if the exercise rope is pulled straight up so that the forearm makes an angle of 18° with the
horizontal? Assume the biceps muscle is still perpendicular to the forearm. (Assume the same stretch in the rope as part (a). Enter the
magnitude.)

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