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. Biceps muscle Assume the forearm has a mass of 2.15 kg and a length of 0.405 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to Humerus hold an object of mass 4.95 kg so that her forearm remains motionless, what is the force exerted by the biceps muscle? Radius M Elbow. Ulna force: N Hand

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. Biceps muscle Assume the forearm has a mass of 2.15 kg and a length of 0.405 m. When the humerus and the biceps are nearly vertical and the forearm is horizontal, if a person wishes to Humerus hold an object of mass 4.95 kg so that her forearm remains motionless, what is the force exerted by the biceps muscle? Radius M Elbow. Ulna force: N Hand

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section: Chapter Questions

Problem 8WUE: A horizontal plank 4.00 m long and having mass 20.0 kg rests on two pivots, one at the left end and...

See similar textbooks

Similar questions

A horizontal plank 4.00 m long and having mass 20.0 kg rests on two pivots, one at the left end and a second 1.00 m from the right end. Find the magnitude of the force exerted on the plank by the second pivot. (See Section 8.4.)
A spade is modelled as a uniform rod, of mass 2kg and length 90cm, attached to a uniform square lamina, of side 20cm and mass 0.5kg. A gardener holds the spade horizontally with hands 30cm and 60cm from the end of the rod. Find the vertical forces exerted by the gardener's hands. Im stuck on this q, pls help.
How far is the person sitting from the left cable if 7m long beam of negligible mass is hanged horizontally and is supporyed at each end by vertical cables? A person of unknown weight is sitting on it somewhere between the cables. The tension in the left cable is 300N, and in the right cable is 400N.
Find the force exerted by the biceps muscle in holding a 1.00-L milk carton (weight 9.90 N) with the forearm parallel to the floor. Assume that the hand is 35.0 cm from the elbow and that the upper arm is 30.0 cm long. The elbow is bent at a right angle, and one tendon of the biceps is attached to the forearm at a position 5.00 cm from the elbow, while the other tendon is attached at 30.0 cm from the elbow. The weight of the forearm and the empty hand is 16.9 N, and the center of gravity of the forearm with hand is at a distance of 16.5 cm from the elbow.
The pole has insignificant weight.Thehorizontal and vertical components of the force of the hinge are ______ and _____ respectively Choices: 800 N, 800N 800 N, 600N 0 N, 800N 600 N, 800N 1200 N,800N Show complete solution and free body diagram
Jack and Rose are carrying a uniform rod that is 3.00m long and weighs 160.N. If Rose lifts at one end with an upward force equal to 60.0N, how far from Rose should Jack lift so that the rod will be horizontal and in equilibrium?
A horizontal plank 4.00 m long and having mass 20.0 kg restson two supports, one at the left end of the plank and a second1.00 m from the right end of the plank. What is the magnitude of theforce exerted on the plank by the support on the right side?
A uniform 37.0 kg scaffold of length 6.2 m is supported by two light cables, as shown below. An 82.0 kg painter stands 1.0 m from the left end of the scaffold, and his painting equipment is 1.6 mfrom the right end. If the tension in the left cable is twice that in the right cable, find the tensions in the cables (in N) and the mass of the equipment (in kg). (Due to the nature of this problem, do not use rounded intermediate values in your calculations).
Two people, let’s call them person A and person B, carry a uniform board of length 6 meters and weight 150 N. Person A is 1 m from one end and person B is 2 m from the other end. What weight does person A support? What weight does person B support?
Given that the weight of the lower arm is Mg = 16.0 N , and that the force meter reads F = 87.0 N , what is the force FT exerted vertically upward by the triceps?
Consider a ladder with a painter climbing up it, as shown in Figure Q1.1. If the mass of the ladder is 12.0 kg, the mass of the painter is 55.0 kg, and the ladder begins to slip at its base when her feet are 70% of the way up the length of the ladder, determine: i) the force Fw, ii) the force Fc.
We have two masses balanced on a centered beam on a fulcrum. If m1 = 10 kg, and m2 = 20 kg, what should the length of the lever arm, r2, be to keep everything balanced when r1 = 10 meters?