30 Oct 2021
Problem 14
Page 250
Section: Questions
Chapter 9: Static Equilibrium; Elasticity And Fracture
Textbook ExpertVerified Tutor
30 Oct 2021
Given information
Given: Touching your toes while you are seated on the floor with outstretched legs. Touching your toes from a standing position.
Step-by-step explanation
Step 1.
Take the pivot at waist height for a person sitting with legs extended (shown in the figure). Consider the weight of the upper half of the body doing torque clockwise, for this force the lever arm is relatively small as is the torque made by the arms, therefore the muscles of the back do not do much tension due to the small total torque performed.
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