A person exerts a horizontal force of 190 N in the test apparatus shown in the figure. Find the horizontal force that his flexor muscle exerts on his forearm. Number i Units 0.34 m Flexor muscle M 190 N 0.054 m Elbow joint
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- In the figure below, the biceps muscle exerts a force supporting a perpendicular forearm and a book. Suppose we replace the book with an elastic exercise rope that obeys Hooke's Law. Assume its force constant k = 453 N/m. Triceps muscle Biceps U muscle PHYSICS m, = 4.3 kg CG FE m, = 3.7 kg Wo CG 4.0 cml Wa 16 cm 38 cm (a) How much is the rope stretched (past equilibrium) to provide the same force w, as before the book was replaced? Assume the rope is held in the hand at the same location as the book. (Enter your answer in cm.) |cm (b) What force (in N) is on the biceps muscle if the exercise rope is pulled straight up so that the forearm makes an angle of 18° with the horizontal? Assume the biceps muscle is still perpendicular to the forearm. (Assume the same stretch in the rope as part (a). Enter the magnitude.)To pull with a force F=172 N on the scale as shown, what should the tension in your biceps muscle be? The distance h = 0.30 m. magnitude DirectionIn the figure below, the biceps muscle exerts force supporting a perpendicular forearm and a book, Suppose we replace the book with an elastic exercise rope that obeys Hooke's Law. Assume its force constantk = 433 N/m. Triceps muscle Biceps V muscle PHYSICS m, = 4.3 kg CG m, = 2.2 kg CG Wa 38 cm (a) How much is the rope stretched (past equilibrium) to provide the same force w as before the book was replaced? Assume the rope is held in the hand at the same location as the book. (Enter your answer in cm.) cm (b) What force (in N) is on the biceps muscle If the exercise rope is pulled straight up so that the forearm makes an angle of 24° with the horizontal? Assume the biceps muscle is still perpendicular to the forearm. (Assume the same stretch in the rope as part (a). Enter the magnitude.)
- The biceps muscle exerts a muscle force of 1000N on the forearm, as per below. The muscle force acts at an angle of 30deg to the forearm. How large are the horizontal and vertical components of this force that holds the forearm in place?Triceps muscle Biceps m-40 kg m- 25 kg Calculate the force the biceps muscle must exert to hold the forearm and its load as shown in the Figure? * O 480 N.m O None of the answers O 400 N.m O 0.480 kN O 48 NEverett is attempting to lift 112 N. The perpendicular distance from the weight to his elbow joint is 21 cm. Theforce created by the elbow flexor muscles is 1485 N. The perpendicular distance from this force to the elbow jointis 1.8 cm. Is Everett able to lift the weight with this amount of force in his flexor muscles?
- The arm in the figure below weighs 37.7 N. The force of gravity acting on the arm acts through point A. Determine the magnitudes of the tension force in the deltoid muscle and the force F S exerted by the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown. (Enter your answers to at least the nearest newton.) N Ft Fs N √12⁰ 0 F 0.080 m -0.290 m TEA person places his hand palm downward on a scale and pushes down on the scale until it reads 96.0 N. The triceps muscle is responsible for this arm extension force. Find the force exerted by the triceps muscle. The bottom of the triceps muscle is 2.50 cm to the left of the elbow joint, and the palm is pushing at approximately 29.0 cm to the right of the elbow joint. P 96.0 N 2.50 cm and Q = 29.0 cm. where P =5. The biceps exerts a pulling force of 800 N on the radius. The force acts at an angle of 30 degree in the anterior Fx and superior Fy direction. Calculate the force Fx that flexes the elbow joint as shown in the diagram. (Given that cos 30-0.866 and sin 30=0.5). Fy a.400 b.693 c.512 d.122 e.330 Ans:c Fx 800 N
- Approximately what magnitude force, FM, must the extensor muscle in the upper arm exert on the lower arm to hold a 4.3-kg shot put (Figure 1)? Assume the lower arm has a mass of 3.0 kg and its CG is 13 cm from the elbow-joint pivot.В A cook holds a 1.72-kg carton of milk at arm's length (see the figure below). What force Fa must be exerted by the biceps muscle? (Ignore the weight of the forearm. Give the magnitude.) N Milk 75.00 25.0 cm- 8.00 cm23. The diagram below shows a door viewed from above. Much to their parent's annoyance, two kids are fighting over opening/closing the door - do not do this at home! (Note that the door does not have a latch exerting any force on it) The diagram below shows the force that child A is exerting on the door: of magnitude F in the south direction, a distance of L/3 from the hinge. N wefe W E S F hinge L/3 L Child B decides to exert a force on the edge of the door, as far as possible from the hinge. What is the magnitude and direction of the force that child B must exert if the door does not move? A) Force of magnitude F in the north direction B) Force of magnitude F in the east direction C) Force of magnitude F/3 in the north direction D) Force of magnitude F/3 in the west direction