D. leftright updown The biceps brachii is the typical muscle we associate with forearm curls. The forearm pivots aboutthe elbow joint and the biceps muscle inserts along the radius (one of two major forearm bones),d₁ = = 5 cm from the pivot. In our case, consider a forearm of length of d3 = 34 cm and weight ofW = 3lbs, with a center of mass shifted toward the pivot, at d₂ = 15 cm from the elbow. There is areaction force R at the elbow joint not shown in the figure. As a first approximation, assume thebiceps muscle inserts at a 90 degree angle while the forearm is held parallel to the ground.Assume all quantities are correct to 2 significant figures.b)CaMElWa) If the person described above is holding a 22 lb object exerting a force F in static equilibrium, whatis known about the tension force M applied by the biceps brachii?FThe force is less than 22 lbs.The force is equal to 22 lbs.The force is greater than 22 lbs but less than 25 lbs. chii.The force is equal to 25 lbs.The force is greater than 25 lbs.conditions of static equilibrium, a) If the person described above is holding a 22 lb object exerting a force F in static equilibrium, whatis known about the tension force M applied by the biceps brachii?Fb) Using the numerical values stated in the problem and the conditions of static equilibrium,calculate the tension force M in lbs, applied by the biceps brachii.Enter to 2 significant figuresM =lbsc) Using the numerical values stated in the problem, your answer for (b), and the conditions of staticequilibrium, calculate the magnitude of the reaction force R in lbs, produced at the elbow joint.Enter to 2 significant figuresR =lbsd) In what direction is the reaction force that you calculated in part c?e) The forearm is lowered from horizontal. The biceps brachii now meets the radial arm at an angleof 60 degrees rather than 90 degrees. How does this effect the magnitude of the tension force Mcompared to the horizontal arm orientation?Hint: It might be helpful to refer to torque equilibrium for this case. What happens to the momentarm of all forces?M must increase to maintain equilibrium.M does not need to change to maintain equilibrium.M must decrease to maintain equilibrium.

Answered: Image /qna-images/answer/b6c5f135-da77-4a0b-a03f-8c55b1f834f0.jpg

The biceps brachii is the typical muscle we associate with forearm curls. The forearm pivots about the elbow joint and the biceps muscle inserts along the radius (one of two major forearm bones), d₁= = 5 cm from the pivot. In our case, consider a forearm of length of d3 = 34 cm and weight of W = 3lbs, with a center of mass shifted toward the pivot, at d₂ = 15 cm from the elbow. There is a reaction force R at the elbow joint not shown in the figure. As a first approximation, assume the biceps muscle inserts at a 90 degree angle while the forearm is held parallel to the ground. Assume all quantities are correct to 2 significant figures.

The biceps brachii is the typical muscle we associate with forearm curls. The forearm pivots about the elbow joint and the biceps muscle inserts along the radius (one of two major forearm bones), d₁= = 5 cm from the pivot. In our case, consider a forearm of length of d3 = 34 cm and weight of W = 3lbs, with a center of mass shifted toward the pivot, at d₂ = 15 cm from the elbow. There is a reaction force R at the elbow joint not shown in the figure. As a first approximation, assume the biceps muscle inserts at a 90 degree angle while the forearm is held parallel to the ground. Assume all quantities are correct to 2 significant figures.

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)...

See similar textbooks

Related questions

Q: What is the sum of the vectors with components (0,-3) ad (-1,2)? A. (-1,-1). B. (1,1) C. -2 D.…

Q: x (cm) 3.0 2.0 1.0 -1.0 -2.0 -3.0 0.50 1.0 A 2.41 kg ball is attached to an unknown spring and…

Q: Two vectors are added, with lengths of five meters and three meters respectively; I don't know the…

Q: Based on the provided diagram, express F1, F2, F3 in Cartesian vector form - in terms of “i” and…

A: Given data, F1 = 50 N F2 = 80 N F3 = 30 N

Q: A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at…

A: Initial velocity of the rock u=12.2 m/s Angle of projection θ=530 Horizontal distance /range of the…

Q: Calculate the y component of a vector whose displacement is 20 meters and whose direction is north.…

A: Displacement (d) = 20 mDirection = North

Q: A car has an eastward velocity component of VE = 55 mph E, and a northward velocity component of VN…

A: The problem is asking for the angle of the car's velocity vector, measured North of East. This is a…

Q: Which of the following is an INCORRECT vector operation? O a. O b. O C. O d. B-A= -(B-A) B + A = A +…

A: GIVEN vector are given ,

Q: A car has an eastward velocity component of VE = 55 mph E, and a northward velocity component of VN…

A: The problem is asking for the angle of the car's velocity vector, measured North of East. This means…

Q: D. -y

A: Using the graph of given vectors: B→=(-4-(-12))i^+8j^B→=8i^+8j^…

Q: Six vectors are shown below. ン Select all vectors which have the same magnitude.

A: The quantities which has both magnitude and direction are called vectors. A vector has a head and a…

Q: The magnitude of the resultant of the vectors shown in figure is 5 N 7N

Q: What is the magnitude of 4A if vector A = (6 i - 8 j) m? A. 40m B. 30m C. 10m D. 20m

Q: 1. What is the value for the horizontal acceleration vector (direction and magnitude)? 2. What is…

A: Value for the horizontal acceleration vector : There is no horizontal acceleration in case of…

Q: 3A B equals

Q: The grid runs from -5 to 5 on both axes. Drawn on this grid are four vectors, labeled A⃗ A→ through…

A: Introduction: Vectors are the quantity which require both magnitude and direction for its…

Q: 56. A forklift is used to offload freight from a delivery truck. Together the forklift and its…

A: a. The force vector in terms of i and j can be represented as shown below.…

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

100%

left
right
up
down

The biceps brachii is the typical muscle we associate with forearm curls. The forearm pivots about
the elbow joint and the biceps muscle inserts along the radius (one of two major forearm bones),
d₁ = = 5 cm from the pivot. In our case, consider a forearm of length of d3 = 34 cm and weight of
W = 3lbs, with a center of mass shifted toward the pivot, at d₂ = 15 cm from the elbow. There is a
reaction force R at the elbow joint not shown in the figure. As a first approximation, assume the
biceps muscle inserts at a 90 degree angle while the forearm is held parallel to the ground.
Assume all quantities are correct to 2 significant figures.
b)
Ca
M
El
W
a) If the person described above is holding a 22 lb object exerting a force F in static equilibrium, what
is known about the tension force M applied by the biceps brachii?
F
The force is less than 22 lbs.
The force is equal to 22 lbs.
The force is greater than 22 lbs but less than 25 lbs. chii.
The force is equal to 25 lbs.
The force is greater than 25 lbs.
conditions of static equilibrium,

a) If the person described above is holding a 22 lb object exerting a force F in static equilibrium, what
is known about the tension force M applied by the biceps brachii?
F
b) Using the numerical values stated in the problem and the conditions of static equilibrium,
calculate the tension force M in lbs, applied by the biceps brachii.
Enter to 2 significant figures
M =
lbs
c) Using the numerical values stated in the problem, your answer for (b), and the conditions of static
equilibrium, calculate the magnitude of the reaction force R in lbs, produced at the elbow joint.
Enter to 2 significant figures
R =
lbs
d) In what direction is the reaction force that you calculated in part c?
e) The forearm is lowered from horizontal. The biceps brachii now meets the radial arm at an angle
of 60 degrees rather than 90 degrees. How does this effect the magnitude of the tension force M
compared to the horizontal arm orientation?
Hint: It might be helpful to refer to torque equilibrium for this case. What happens to the moment
arm of all forces?
M must increase to maintain equilibrium.
M does not need to change to maintain equilibrium.
M must decrease to maintain equilibrium.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Information given in the question

VIEW

Step 2: Part A -The tension force applied by bicep muscle

VIEW

Step 3: Part B- Magnitude of the tension force applied by the bicep muscle

VIEW

Step 4: Part C- Magnitude of reaction at elbow joint

VIEW

Step 5: Part D - Direction of reaction force

VIEW

Step 6: Part E- Magnitude of M when the angle is 60 degrees

VIEW

Solution

VIEW

Step by step

Solved in 7 steps with 7 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

What part of VECTOR ADDITION is the most difficult for you to do? pls help really help
ASAP
An inclined plane has angle theta with respect to the vertical. A. Find an expression for the components in the direction of the plane. B. Find an expression for the component of gravity in the direction perpendicular to the plane. C. Sketch figures which illustrate parts a and b above; highlight and label the results.
4 pt) Two vectors appear as in the figure. Which combination points directly downward? Circle the correct answer and support your choice with the drawing below. A. ? + ? B. ? ― ? C. ? ― ? D. ― ? ― ?
See attached image. Please help me solve a and b. Don't need help with c and d
Two vectors, of magnitudes 20 mm and 50 mm, are added together. Which one of the following is a possible value for the magnitude of the resultant? 20 mm b. 40 mm c. 10 mm d. 80 mm
Determine the horizontal component of a 10.20-N force, applied 17 degrees below the horizontal The act of combining several vectors yields a new vector (capable of replacing the original ones with the same effect) called a : A. Sum B. Equilibrant C. Resultant D. Total What is not useful in characterizing a vector? A. Unit B. Angle C. Direction D. Magnitude
9. For the vector Ã in the attached figure, what is the value for the component Ã, A
A plane flies with a velocity of 235m/s making an angle of 48 degrees, North of East. a. Draw the vector addition
The initial velocity vector, v, and the final velocity vector, v, are shown below. Which of the following represents the change in velocity Av? V A. Select one: C. 17/ AV 1° B. D. 4 MA