A waiter holds two plates of food in one hand. His forearm has a mass of 2.8kg and the centre of mass of his forearm is located 11cm from his elbow joint. The centre of mass of the two plates is located 32cm from his elbow joint and the total mass of the two plates is 1.75kg. His bicep is attached to the bones of his forearm is 3.6cm from his elbow joint. Assume his forearm is held completely horizontal. a. What is the torque produced by the mass of the two plates? Torque = Nm b. What is the torque produced by the mass of the waiter's forearm? Torque = 0 c. What force must be exerted by the waiter's biceps muscle to ensure that the plates and forearm are motionless? Ny Force = Nm

A waiter holds two plates of food in one hand. His forearm has a mass of 2.8kg and the centre of mass of his forearm is located 11cm from his elbow joint. The centre of mass of the two plates is located 32cm from his elbow joint and the total mass of the two plates is 1.75kg. His bicep is attached to the bones of his forearm is 3.6cm from his elbow joint. Assume his forearm is held completely horizontal. a. What is the torque produced by the mass of the two plates? Torque = Nm b. What is the torque produced by the mass of the waiter's forearm? Torque = 0 c. What force must be exerted by the waiter's biceps muscle to ensure that the plates and forearm are motionless? Ny Force = Nm

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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