Physics help.
A. Calculate the force, FM required of the "deltoid" muscle to hold up the outstretched arm shown in the figure. The total mass of the arm is 2.7 kg.
B. Calculate the magnitude of the force exerted by theshoulder joint on the upper arm.
Homework Answers
and by balancing tourques about oint of application of Fj
FMsin15 *12 =mg*24
FM =204.46 N
FJ = 211.67 N
The total mass of the arm shown in (Figure 1) is 3.5 kg . The location...
The total mass of the arm shown in (Figure 1) is 3.5 kg . The
location of the center of mass of the arm is shown, FM is the force
exerted by the deltoid muscle on the upper arm, and FJ is the
normal force from the shoulder joint on the upper arm.
Part A
Determine the magnitude of the force required from the deltoid
muscle to hold up the outstretched arm in the position shown.
Part B
Suppose this...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is 56 cm long, and its center of gravity is 21 cm from the shoulder. The hand at the end of the arm hold a mass of 6.0 kg. (a) What is the torque about the shoulder due to the weights of the arm and the 6.0 kg mass? (b) If the arm is held in position by the deltoid muscle, whose force on the...
You are able to hold your arm in an outstretched position because of the deltoid muscle....
You are able to hold your arm in an outstretched position
because of the deltoid muscle. The force diagram for this is shown
below. Assume that the weight of the humerus is 8 lb (with a center
of gravity as shown), and that the deltoid muscle makes an angle of
α = 18 degrees to the humerus.
What is the magnitude of the tension in the deltoid muscle? What
is the magnitude of the force F at the joint?
Deltoid...
You are able to hold out your arm in an outstretched horizontal position because of the action of the deltoid muscle. A...
You are able to hold out your arm in an outstretched horizontal position because of the action of the deltoid muscle. Assume the humerus bone has a mass M1=3.6kg, length L=0.66m and its center of mass is a distance L1=0.33m from the scapula. (For this problem ignore the rest of the arm.) The deltoid muscle attaches to the humerus a distance L2=0.15m from the scapula. The deltoid muscle makes an angle of ?=17? with the horizontal, as shown. (Figure 1)...
Part A is correct, but I cant figure out parts B or C You are able...
Part A is correct, but I cant
figure out parts B or C
You are able to hold your arm in an outstretched position because of the deltoid muscle. The force diagram for this is shown below. Assume that the weight of the humerus is 6 lb (with a center of gravity as shown), and that the deltoid muscle makes an angle of a - 15 degrees to the humerus. Deltoid muscle Humerus mg 1) What is the magnitude of...
please answer in full detail 4. Use the drawing below as a model of forces involved...
please answer in full detail
4. Use the drawing below as a model of forces involved in holding an outstretched arm stationary, let Fu model the "deltoid muscle, which provides tension at an angle of to the bones and _cm represent the center of mass of the arm. X_M12 cm x cm 24 cm mass of the arm - 3.3 kg 015 a. the shoulder joint labeled in the above figure but decomposed into it's - and y. components in...
please answer C, and confirm that A and B are correct. (if you can) Fa Fm...
please answer C, and confirm that A and B are correct. (if you
can)
Fa Fm (17.0" from ) a) (10 pts) Calculate the torque, about the Z-axis through the shoulder joint, due to the force of gravity on the dumbbell, Fa. (2, 23x9.80) dercos (43) Tdt d. Fa - (0.545)(COS(43)) td-(0.645X21.854) d-0.3986 m Td 11.91 Nm b) (10 pts) Calculate the torque, about Z-axis through the shoulder joint, due to the force of gravity on the mass of the...
When you hold your arm outstretched, it's supported primarily by the deltoid muscle.
When you hold your arm outstretched, it's supported primarily by the deltoid muscle. The given figure shows a case in which the deltoid exerts a 67 N force at 15 degrees to the horizontal. If the force-application point is 18 cm horizontally from the shoulder joint, what torque does the deltoid exert about the shoulder?
A standard man holds the upper arm vertical and the lower arm horizontal with an object...
A standard man holds the upper arm vertical and the lower arm horizontal with an object of mass M = 5 kg resting on the hand, as illustrated in the figure. The mass of the lower arm and hand is one-half the mass of the entire arm. As shown in the figure, there are four forces acting on the lower arm: the force Fexerted by the bones and ligaments of the upper arm at the elbow (fulcrum), the tension T...
Deltoid muscle Fig. 1a Problem #2.1 You are able to hold your arm in an outstretched...
Deltoid muscle Fig. 1a Problem #2.1 You are able to hold your arm in an outstretched position because of the deltoid muscle. The force diagram for this is shown in Fig. 1b. Use the equilibrium conditions to determine the tension T in the deltoid muscle needed to achieve this equilibrium, and the vertical and horizontal components of the force exerted by the scapula (shoulder blade)on the humerus. Assume the weight of the humerus is 36.0 N and the deltoid muscle...
The total mass of the arm shown in (Figure 1) is 3.5 kg . The
location of the center of mass of the arm is shown, FM is the force
exerted by the deltoid muscle on the upper arm, and FJ is the
normal force from the shoulder joint on the upper arm.
Part A
Determine the magnitude of the force required from the deltoid
muscle to hold up the outstretched arm in the position shown.
Part B
Suppose this...
3. The figure shows an outstretched arm with a mass of 4.2 kg. The arm is 56 cm long, and its center of gravity is 21 cm from the shoulder. The hand at the end of the arm hold a mass of 6.0 kg. (a) What is the torque about the shoulder due to the weights of the arm and the 6.0 kg mass? (b) If the arm is held in position by the deltoid muscle, whose force on the...
You are able to hold your arm in an outstretched position
because of the deltoid muscle. The force diagram for this is shown
below. Assume that the weight of the humerus is 8 lb (with a center
of gravity as shown), and that the deltoid muscle makes an angle of
α = 18 degrees to the humerus.
What is the magnitude of the tension in the deltoid muscle? What
is the magnitude of the force F at the joint?
Deltoid...
Part A is correct, but I cant
figure out parts B or C
You are able to hold your arm in an outstretched position because of the deltoid muscle. The force diagram for this is shown below. Assume that the weight of the humerus is 6 lb (with a center of gravity as shown), and that the deltoid muscle makes an angle of a - 15 degrees to the humerus. Deltoid muscle Humerus mg 1) What is the magnitude of...
please answer in full detail
4. Use the drawing below as a model of forces involved in holding an outstretched arm stationary, let Fu model the "deltoid muscle, which provides tension at an angle of to the bones and _cm represent the center of mass of the arm. X_M12 cm x cm 24 cm mass of the arm - 3.3 kg 015 a. the shoulder joint labeled in the above figure but decomposed into it's - and y. components in...
please answer C, and confirm that A and B are correct. (if you
can)
Fa Fm (17.0" from ) a) (10 pts) Calculate the torque, about the Z-axis through the shoulder joint, due to the force of gravity on the dumbbell, Fa. (2, 23x9.80) dercos (43) Tdt d. Fa - (0.545)(COS(43)) td-(0.645X21.854) d-0.3986 m Td 11.91 Nm b) (10 pts) Calculate the torque, about Z-axis through the shoulder joint, due to the force of gravity on the mass of the...
A standard man holds the upper arm vertical and the lower arm horizontal with an object of mass M = 5 kg resting on the hand, as illustrated in the figure. The mass of the lower arm and hand is one-half the mass of the entire arm. As shown in the figure, there are four forces acting on the lower arm: the force Fexerted by the bones and ligaments of the upper arm at the elbow (fulcrum), the tension T...
Deltoid muscle Fig. 1a Problem #2.1 You are able to hold your arm in an outstretched position because of the deltoid muscle. The force diagram for this is shown in Fig. 1b. Use the equilibrium conditions to determine the tension T in the deltoid muscle needed to achieve this equilibrium, and the vertical and horizontal components of the force exerted by the scapula (shoulder blade)on the humerus. Assume the weight of the humerus is 36.0 N and the deltoid muscle...
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