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Health, 04.11.2019 22:31, Ryvers

What is the horizontal distance dforearm between the elbow and the point where the weight of the forearm acts?

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Physics, 29.06.2019 13:40, mem8163

In the human arm, the forearm and hand pivot about the elbow joint. consider a simplified model in which the biceps muscle is attached to the forearm 3.80 cm from the elbow joint. assume that the person's hand and forearm together weigh 15.0 n and that their center of gravity is 15.0 cm from the elbow (not quite halfway to the hand). the forearm is held horizontally at a right angle to the upper arm, with the biceps muscle exerting its force perpendicular to the forearm. a) the force exerted by the biceps when the hand is empty= 59.2 n b) when the person holds a 80.0-n weight in his hand, with the forearm still horizontal. the center of gravity of this weight is 33.0 cm from the elbow the force of the bicep= 754 n c) under the conditions of part b, find the magnitude of the force that the elbow joint exerts on the forearm. d)while holding the 80.0-n weight, the person raises his forearm until it is at an angle of 53.0 ? above the horizontal. if the biceps muscle continues to exert its force perpendicular to the forearm, what is this force when the forearm is in this

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Physics, 29.06.2019 16:10, alondrahernande3

Most of the motion generated by joints in the human body are examples of levers. an example of a third class lever is the forearm: the force which generates the motion is located in between the pivot point and the resistance force. the elbow acts as the pivot point, the biceps muscle pulls up on the forearm to move the mass which is held in the hand. imagine you are holding an object in your hand with your forearm horizontal and your upper arm vertical so your elbow creates a 90 angle. if your biceps áttach to your forearm 0.0554 m from the elbow and make an angle of 25.0 with the vertical while a 3.14 kg mass is held in your hand 29.46 cm from the elbow, what force is exerted by the biceps muscle? ignore the mass of the forearm

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Physics, 29.07.2019 21:30, jahnoibenjamin

When you lift an object by moving only your forearm, the main lifting muscle in your arm is the biceps. suppose the mass of a forearm is 1.40 kg . if the biceps is connected to the forearm a distance dbiceps = 2.50 cm from the elbow, how much force fbiceps must the biceps exert to hold a 1000 g ball at the end of the forearm at distance dball = 33.0 cm from the elbow, with the forearm parallel to the floor? how much force felbow must the elbow exert? draw the vectors starting from the point of application of each force. the location and orientation of the vectors will be graded. the length of the vectors will not be graded?

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