Bone- Muscle100°30 cm4 cm40 cm(A)(B)FIGURE 1.12 (A) Weight held in hand. (B) A simplified drawing of (A).The dimensions shown in Fig. 1.12 are reasonable for a human arm, but theywill, of course, vary from person to person. The weight pulls the arm downward.Therefore, the muscle force acting on the lower arm must be in the up direction.Accordingly, the prime active muscle is the biceps. The position of the upperarm is fixed at the shoulder by the action of the shoulder muscles. We will cal-culate, under the conditions of equilibrium, the pulling force Fm exerted by thebiceps muscle and the direction and magnitude of the reaction force F, at thefulcrum (the joint). The calculations will be performed by consideringthe arm position as a Class 3 lever, as shown in Fig. 1.13. The x- and y-axesare as shown in Fig. 1.13. The direction of the reaction force F, shown is aguess. The exact answer will be provided by the calculations.In this problem we have three unknown quantities: the muscle force Fm,the reaction force at the fulcrum F,, and the angle, or direction, of this force p. 5. Calculate the force applied by the biceps and the reaction force (F,) atthe joint as a result of a 14-kg weight held in hand when the elbow is at(a) 160° and (b) 60°. Dimensions are as in Fig. 1.12.Assume that the upper part of the arm remains fixed as in Fig. 1.12Note that under these conditionsthe lower part of the arm is no longer horizontal.

Answered: Calculate the force applied by the…

Similar questions

Needs Complete typed solution with 100 % accuracy.
Needs Complete typed solution with 100 % accuracy. Don't use chat gpt please.
A horizontal cable supports the boom of a crane. If the tension in the cable is4500 N and the crane is supporting a 7500-N girder, what is the compressionin the boom?
What should be the final reading in the analytical balance if the pharmacist is to weigh 15.7500 g and the weight of the weighing boat is 3.2671 g? O 19.0171 g 9.2158 g 15.7500 g 12.4829 g
The figure represents the concurrent force system acting at a joint of a bridge truss. Determine the values of Force P and Force F to maintain equilibrium of the forces. Use the reference angle of the forces with the x-axis in the computation.
Determine the magnitude and the direction of the resultant force either by calculations or by accurate construction and measurements (use scale 10mm=50N)
Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring. When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m. Assume that immediately after block (weight of 260 N) is hung at the end of the beam the spring does not stretch, calculate the tension under this assumption. Using this tension find how much the spring stretches. Express the amount the spring is stretched in cm. k =8275 N/m.
35.0° Dinysics Demos SuDDly Co. The pole is held horizontally by a massless wire under 305 N of tension, connected at a 35° angle. A 8 kg sign hangs from the end of the 4 meter pole. The pole has mass 4 kg. How far away is the wire is attached from the wall? Answer in meters to 3 sig figs.
y T F х F, An object is subjected to three forces as shown in the figure. Assume F1 = 80.0 N and F2 = 95.0 N, what is T if the object is in static equilibrium? Enter a number with three significant digits.
please check the solution and solve part d
A rectangular plate is supported by three cables as shown. Knowing that the tension in cable AD is 332 N, determine the weight (N) of the plate
You hang a mass of the right side of an equal arm balence and then pull on the hanger with your hand to keep it balanced. (a) if you pull on the left side of the balance do you have to pull up or down to keep the balance in equalibrium? b) if you pull on the right side of the balance do you have to pull up or down to keep the balance in equalibrium?

SEE MORE QUESTIONS