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## Class 11 Physics (India)

### Unit 13: Lesson 2

Shear and bulk stress

# Shear modulus

Let's explore a new modulus of elasticity called shear modulus (rigidity modulus). This will also explain why our bones are strong and yet can be fractured easily. Created by Mahesh Shenoy.

## Want to join the conversation?

• Do viscous fluids too have G (modulus of rigidity) = 0, or is idea only valid for ideal fluids? Please note that viscous fluids have "wet friction" to resist the sliding past of their layers.
• "At , he said that even for a small amount of strain , the sress produced is very high . But stress is directly proportional to strain , so a small amount of strain would have produced a small amount of stress . Can someone explain how a small strain is producing large stress?"
• because it also depends on Modulus of Rigidity/Shear Modulus
• I have watched a drop of water very carefully and found that

water don't have shear modules as zero

is my observation is correct??
(1 vote)
• ZnO+H2 = Zn + H2O . In this reaction Zn is more reactive than H2 then how does it displaces Zn
(1 vote)
• When we fall from terrace and then suppose we lend on our foot at that time compressive force will be applied on our femur so it will get fracture or not