A father lifts his child as shown in the figure below. How much torque does the child exert, taking the knee as the pivot? How much torque does the weight of the leg itself exert? What force (FQ) should the upper leg muscle exert to lift the child at a constant speed? F. r = 20.0 cm = 38.0 cm = 2.0 cm CG m- 4.0 kg Wos- 10 kg child

A father lifts his child as shown in the figure below. How much torque does the child exert, taking the knee as the pivot? How much torque does the weight of the leg itself exert? What force (FQ) should the upper leg muscle exert to lift the child at a constant speed? F. r = 20.0 cm = 38.0 cm = 2.0 cm CG m- 4.0 kg Wos- 10 kg child

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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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

A father lifts his child as shown in the figure below.
How much torque does the child exert, taking the knee as the pivot?
How much torque does the weight of the leg itself exert?
What force (Fo) should the upper leg muscle exert to lift the child at a constant speed?
Fo
r = 20.0 cm
= 38.0 cm
= 2.0 cm
CG
m- 4.0 kg
= 10 kg

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