Physics
Compare the anatomy of the human arm (Figure 2) with the apparatus that will be used to model
the human arm (Figure 3:(a) Diagram of equipment used to model the human arm, as demonstrated
in (b).and label which parts of the apparatus are models of the following parts of the arm:
a) Radius bone.
b) Humerus bone.
c) Bicep muscles.
d) Hand holding weight.
e) Elbow.
f) Point where the bicep attaches to the radius bone.
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Physics of the Human Arm If you have ever done bicep curls at the gym and looked at your arm in the mirror while you were doing it, you might have seen something like Figure 1 (plus or minus tan...
Physics of the Human Arm If you have ever done bicep curls at the gym and looked at your arm in the mirror while you were doing it, you might have seen something like Figure 1 (plus or minus tanned skin and/or hair! Figure 1: Outside of arm lifting a weight using mostly the contracted bicep muscles We know what's going on under your skin from anatomy. The bicep muscles are attached via tendons to the top of your shoulder...
After a busy grocery shopping trip, you are carrying multiple bags on your arm to get...
After a busy grocery shopping trip, you are carrying multiple bags on your arm to get every- thing into the house quickly. You have one bag containing 15 kg of groceries in your hand and another10kgbag8cmupyourarm. Yourlowerarmis28cmlongandhasamassof3kg. Your your bicep is connected to your lower arm 3 cm towards your hand from your elbow. The elbow is the hinge between your lower arm and the humerus bone of the upper arm. The humerus is 24 cm long and has a...
A woman lifts a 3.6-kg barbell in each hand with her arm in a horizontal position...
A woman lifts a 3.6-kg barbell in each hand with her arm in a
horizontal position at the side of her body and holds it there for
3 s (see the figure below).
What force does the deltoid muscle in her shoulder exert on the
humerus bone while holding the barbell? The deltoid attaches 13 cm
from the shoulder joint and makes a 13? angle with the humerus. The
barbell in her hand is 0.55 m from the shoulder joint,...
L/2 dsin(0)7 Figure 4: Bending force diagram of model ofarm. Exercise 2: Figure 4 is an incomplete diagram of the three forces acting on the arm model that may cause bending around the central jo...
L/2 dsin(0)7 Figure 4: Bending force diagram of model ofarm. Exercise 2: Figure 4 is an incomplete diagram of the three forces acting on the arm model that may cause bending around the central joint. The red arrows represent the three forces. Copy this diagram and complete it by doing the following: Label the red arrow representing the weight of the load held by the hand as "Wmg". Label the red arrow representing the tension in the bicep as "FB...
3) Bicep Curls Your elbow is the pivot point for your forearm. Your bicep attaches to...
3) Bicep Curls Your elbow is the pivot point for your forearm. Your bicep attaches to your forearm at 0.05m. Your forearm is nominally 0.35m to the center of your hand, where you hold a weight the Earth on your forearm is 12N. a) Draw a free body diagram and an EFBD for when your forearm is parallel to the ground. b) The system is in static equilibrium. Sum the torques and the forces. Make sure you identify them all....
An athlete is measuring the force by their flexor muscle by pulling a rope horizontally at...
An athlete is measuring the force by their flexor muscle by pulling a rope horizontally at a constant force. While pulling the rope the muscle applies a force on the forearm an angle of 71° as shown in the diagram. While keeping your forearm completely vertical, the tension in the rope is at 185N. The athlete's muscle is attached to the forearm 5 cm from the elbow joint and that the weight of your forearm is 22 N with a...
You are to assess the biomechanics of a male’s arm using his bicep to hold a...
You are to assess the biomechanics of a male’s arm using his bicep to hold a 20 kg object in his hand. The upper arm is perpendicular to the ground while the forearm is parallel to the ground. The male’s forearm is 26.5 cm long and weighs 1.42 kg. The man’s hand weighs 0.54 kg and is 19 cm long. The center of masses for the forearm and hand are 43% and 50% of the extremity lengths from the proximal...
The diagram above shows a side view of a person’s arm. The forearm and hand together...
The diagram above shows a side view of a person’s arm. The
forearm and hand together weigh 19N (WFH = 19N). The
center of gravity at point T is located 24cm from
the elbow joint. The person is holding a bowling ball 38cm from the
elbow and the ball weighs 47N (WB = 47N).
(a) Calculate the torque produced by the weight of the forearm
and hand about the elbow joint. Include the direction of the
torque.
(b) Calculate the...
A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the...
A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the elbow and the shoulder joint, may be approximated as a 0.35-m-long cylinder with an outer radius of 1.09 x 102 m and a hollow inner core with a radius of 3.6 x 10 m. Excluding the arm, the mass of the gymnast is 47 kg. Bone has a compressional Young's modulus of 9.4 x 10' N/m2. (a) What is the compressional strain of the...
In the movie Terminator, Arnold Schwarzenegger lifts someone up by the neck and, with both arms...
In the movie Terminator, Arnold Schwarzenegger lifts someone up
by the neck and, with both arms fully extended and horizontal,
holds the person off the ground. If the person being held weighs
610.0 N, is 60 cm from the shoulder joint, and Arnold has an
anatomy analogous to that in the figure below, what force must each
of the deltoid muscles exert to perform this task? [Hint: The
weight of the arm is 30.0 N and its center of gravity...
Physics of the Human Arm If you have ever done bicep curls at the gym and looked at your arm in the mirror while you were doing it, you might have seen something like Figure 1 (plus or minus tanned skin and/or hair! Figure 1: Outside of arm lifting a weight using mostly the contracted bicep muscles We know what's going on under your skin from anatomy. The bicep muscles are attached via tendons to the top of your shoulder...
A woman lifts a 3.6-kg barbell in each hand with her arm in a
horizontal position at the side of her body and holds it there for
3 s (see the figure below).
What force does the deltoid muscle in her shoulder exert on the
humerus bone while holding the barbell? The deltoid attaches 13 cm
from the shoulder joint and makes a 13? angle with the humerus. The
barbell in her hand is 0.55 m from the shoulder joint,...
L/2 dsin(0)7 Figure 4: Bending force diagram of model ofarm. Exercise 2: Figure 4 is an incomplete diagram of the three forces acting on the arm model that may cause bending around the central joint. The red arrows represent the three forces. Copy this diagram and complete it by doing the following: Label the red arrow representing the weight of the load held by the hand as "Wmg". Label the red arrow representing the tension in the bicep as "FB...
3) Bicep Curls Your elbow is the pivot point for your forearm. Your bicep attaches to your forearm at 0.05m. Your forearm is nominally 0.35m to the center of your hand, where you hold a weight the Earth on your forearm is 12N. a) Draw a free body diagram and an EFBD for when your forearm is parallel to the ground. b) The system is in static equilibrium. Sum the torques and the forces. Make sure you identify them all....
An athlete is measuring the force by their flexor muscle by pulling a rope horizontally at a constant force. While pulling the rope the muscle applies a force on the forearm an angle of 71° as shown in the diagram. While keeping your forearm completely vertical, the tension in the rope is at 185N. The athlete's muscle is attached to the forearm 5 cm from the elbow joint and that the weight of your forearm is 22 N with a...
The diagram above shows a side view of a person’s arm. The
forearm and hand together weigh 19N (WFH = 19N). The
center of gravity at point T is located 24cm from
the elbow joint. The person is holding a bowling ball 38cm from the
elbow and the ball weighs 47N (WB = 47N).
(a) Calculate the torque produced by the weight of the forearm
and hand about the elbow joint. Include the direction of the
torque.
(b) Calculate the...
A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the elbow and the shoulder joint, may be approximated as a 0.35-m-long cylinder with an outer radius of 1.09 x 102 m and a hollow inner core with a radius of 3.6 x 10 m. Excluding the arm, the mass of the gymnast is 47 kg. Bone has a compressional Young's modulus of 9.4 x 10' N/m2. (a) What is the compressional strain of the...
In the movie Terminator, Arnold Schwarzenegger lifts someone up
by the neck and, with both arms fully extended and horizontal,
holds the person off the ground. If the person being held weighs
610.0 N, is 60 cm from the shoulder joint, and Arnold has an
anatomy analogous to that in the figure below, what force must each
of the deltoid muscles exert to perform this task? [Hint: The
weight of the arm is 30.0 N and its center of gravity...
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