1. The PASCO human arm model is configured such thatthe cord representing the bicep is perfectly vertical andthe forearm is at 90° (in the figure to the right, the cordis not quite vertical). A mass of 100 g is attached to thehand. Draw a free-body diagram on the figure to theright showing all forces which act on the forearm.The force of the bicep F on the armThe force of the humerus FH on the armThe weight of the forearm WThe mass in the hand Wm100 gBe careful to draw the force vectors with tails beginning at the point where the force is actuallyapplied to the forearm.2. Consider the free body diagram below. Determine the perpendicular component F̟ of theforce F exerted by the biceps brachii on the forearm. Use the fact that cos 0 = H/B to writethis component directly in terms of the humerus length H and the biceps length B.H3. If the forearm is in equilibrium, then there is no angular acceleration and therefore the sum ofthe torques applied to the forearm must be zero. Using your answer above, write an equationshowing the relationship between the magnitudes of the applied forces F, WA, and Wm.Assume that the center of mass of the arm is half of the arm length l. Choose your origin to bewhere the force of the humerus is applied, so that we don't need to know that force.4. What dothink are some disadvantages of your muscle having such a short lever arm?5. What are some advantages of your muscle having such a short lever arm?

Given information: The Force of the Bicep on the arm = F The Force due to Humerus on the arm = FH The weight of the arm = WA The weight of the ball = Wm The mass of the ball in the hand (m) = 100 g = 0.1 kg let "g" be the acceleration due to gravityThe required free body diagram is drawn as shown below:

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Mechanical Engineering

The PASCO human arm model is configured such that the cord representing the bicep is perfectly vertical and the forearm is at 90° (in the figure to the right, the cord is not quite vertical). A mass of 100 g is attached to the hand. Draw a free-body diagram on the figure to the right showing all forces which act on the forearm. • The force of the bicep F on the arm • The force of the humerus Fy on the arm • The weight of the forearm WA • The mass in the hand Wm Be careful to draw the force vectors with tails beginning at the point where the force is actually applied to the forearm. 100

The PASCO human arm model is configured such that the cord representing the bicep is perfectly vertical and the forearm is at 90° (in the figure to the right, the cord is not quite vertical). A mass of 100 g is attached to the hand. Draw a free-body diagram on the figure to the right showing all forces which act on the forearm. • The force of the bicep F on the arm • The force of the humerus Fy on the arm • The weight of the forearm WA • The mass in the hand Wm Be careful to draw the force vectors with tails beginning at the point where the force is actually applied to the forearm. 100

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

1. The PASCO human arm model is configured such that
the cord representing the bicep is perfectly vertical and
the forearm is at 90° (in the figure to the right, the cord
is not quite vertical). A mass of 100 g is attached to the
hand. Draw a free-body diagram on the figure to the
right showing all forces which act on the forearm.
The force of the bicep F on the arm
The force of the humerus FH on the arm
The weight of the forearm W
The mass in the hand Wm
100 g
Be careful to draw the force vectors with tails beginning at the point where the force is actually
applied to the forearm.
2. Consider the free body diagram below. Determine the perpendicular component F̟ of the
force F exerted by the biceps brachii on the forearm. Use the fact that cos 0 = H/B to write
this component directly in terms of the humerus length H and the biceps length B.
H
3. If the forearm is in equilibrium, then there is no angular acceleration and therefore the sum of
the torques applied to the forearm must be zero. Using your answer above, write an equation
showing the relationship between the magnitudes of the applied forces F, WA, and Wm.
Assume that the center of mass of the arm is half of the arm length l. Choose your origin to be
where the force of the humerus is applied, so that we don't need to know that force.
4. What do
think are some disadvantages of your muscle having such a short lever arm?
5. What are some advantages of your muscle having such a short lever arm?

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