A 200 N weight is held by a student's hand with the forearm horizontal.
A 200 N weight is held by a student's hand with the forearm horizontal. The biceps muscle is located at 30 cm from the joint, and the weight is 80 cm from the joint. Find the upward force in Newtons exerted by the biceps on the forearm? Ignore the weight of the forearm.
280
310
533
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A 200 N weight is held by a student's hand with the forearm horizontal.
Constants A 71.0 kg weight lifter is doing arm raises using a 7.50 kg weight in...
Constants A 71.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0 below the horizontal. (See the figure(Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 6.40 % of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the elbow...
Consider the case of the bicepts muscle acting on a forearm holding a 43 N weight....
Consider the case of the bicepts muscle acting on a forearm
holding a 43 N weight. The forearm is 30° below the horizontal and
the bicepts muscle inserts at an angle of 45° with the forearm. The
muscle insertion is at 5 cm from the elbow joint. The forearm has a
weight of 21 N and has its center of gravity 15 cm from the elbow.
The 43 N weight is held in the hand 30 cm from the joint...
Consider the case of the bicepts muscle acting on a forearm holding a 35 N weight....
Consider the case of the bicepts muscle acting on a forearm holding a 35 N weight. The forearm is 30 below the horizontal and the bicepts muscle inserts at an angle of 45 with the forearm. The muscle insertion is at 5 cm from the elbow joint. The forearm has a weight of 18 N and has its center of gravity 15 cm from the elbow. The 35 N weight is held in the hand 30 cm from the joint...
A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her...
A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0 below the horizontal. (See the figure (Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 5.75% of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the elbow Part...
Determine the maximum weight that can be held where the forearm is horizontal and the upper...
Determine the maximum weight that can be held where the forearm is horizontal and the upper arm is vertical, and where taking the rupture strength of muscle to be 7x10^5 N/m^2, the biceps diameter to be 8.0cm and the mechanical advantage of the forearm to be 0.17 for a lifting a weight with the hand.
11. A 40 newton hand and forearm are held at 90 degrees, the center of gravity...
11. A 40 newton hand and forearm are held at 90 degrees, the center of gravity of the forearm is 15 cm from the elbow joint center. Assume the tendon of the biceps muscle attaches at a 90 degree angle to the forearm at a point 4 cm form the elbow joint center. How much force must the biceps muscle produce to maintain this position? Hint: use net torque to solve. (5 points) Tm = F. Xd Center of rotation
To develop muscle tone, a woman lifts a 4.50 kg weight held in her hand. She...
To develop muscle tone, a woman lifts a 4.50 kg weight held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. a) What is the angular acceleration (in rad/s2) if the weight is 24.0 cm from the elbow joint, her forearm has a moment of inertia of 0.250 kg · m2, and the net force she exerts is 500 N at an effective perpendicular lever arm of 2.20 cm? (Ignore gravity)...
Example 8.6 A Weighted Forearm Goal Apply the equilibrium conditions to the human body. Humerus Biceps...
Example 8.6 A Weighted Forearm Goal Apply the equilibrium conditions to the human body. Humerus Biceps Problem AW = 51.5 N (12 lb) weight is held in a person's hand with the forearm horizontal, as in Figure 8.11. The biceps muscle is attached d = 0.0296 m from the joint, and the I- weight is I = 0.346 m from the joint. (b) Find the upward force F exerted by Figure 8.11 (a) A weight held with the the biceps...
Part A A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight...
Part A A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0° below the horizontal (See the figure(Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 5.75 % of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the...
Biceps muscle The bones of the forearm (radius and ulna) are hinged to the humerus at...
Biceps muscle The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle connects to the bones of the forearm about 2.15 cm beyond the joint. Assume the forearm has a mass of 2.45 kg and a length of 0.465 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to hold an object of mass 5.75 kg so that her forearm remains...
Constants A 71.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0 below the horizontal. (See the figure(Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 6.40 % of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the elbow...
Consider the case of the bicepts muscle acting on a forearm
holding a 43 N weight. The forearm is 30° below the horizontal and
the bicepts muscle inserts at an angle of 45° with the forearm. The
muscle insertion is at 5 cm from the elbow joint. The forearm has a
weight of 21 N and has its center of gravity 15 cm from the elbow.
The 43 N weight is held in the hand 30 cm from the joint...
Consider the case of the bicepts muscle acting on a forearm holding a 35 N weight. The forearm is 30 below the horizontal and the bicepts muscle inserts at an angle of 45 with the forearm. The muscle insertion is at 5 cm from the elbow joint. The forearm has a weight of 18 N and has its center of gravity 15 cm from the elbow. The 35 N weight is held in the hand 30 cm from the joint...
A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0 below the horizontal. (See the figure (Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 5.75% of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the elbow Part...
11. A 40 newton hand and forearm are held at 90 degrees, the center of gravity of the forearm is 15 cm from the elbow joint center. Assume the tendon of the biceps muscle attaches at a 90 degree angle to the forearm at a point 4 cm form the elbow joint center. How much force must the biceps muscle produce to maintain this position? Hint: use net torque to solve. (5 points) Tm = F. Xd Center of rotation
Example 8.6 A Weighted Forearm Goal Apply the equilibrium conditions to the human body. Humerus Biceps Problem AW = 51.5 N (12 lb) weight is held in a person's hand with the forearm horizontal, as in Figure 8.11. The biceps muscle is attached d = 0.0296 m from the joint, and the I- weight is I = 0.346 m from the joint. (b) Find the upward force F exerted by Figure 8.11 (a) A weight held with the the biceps...
Part A A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0° below the horizontal (See the figure(Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 5.75 % of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the...
Biceps muscle The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle connects to the bones of the forearm about 2.15 cm beyond the joint. Assume the forearm has a mass of 2.45 kg and a length of 0.465 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to hold an object of mass 5.75 kg so that her forearm remains...
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