-Elastic Properties of Solids . AP Physics C Mrs. Coyle. Real objects are not rigid but can deform under the influence of an external force. Remember: Hooke’s Law F=-kx. Elastic Properties of Solids. Length (Tensile Stress- Strain) Shape (Shear Stress-Strain) Volume (Bulk Stress-Strain).
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AP Physics C
S is the Shear Modulus,
Unit : N/m2
If the shear stress in steel exceeds 4.00x108 N/m2
the steel ruptures.
a)Determine the shearing force necessary to shear a steel bolt 1.00cm in diameter.
Ans: a) 3.14x104 N
b)Determine the shearing force necessary punch a 1.00cm diameter hole in a steel plate 0.500cm thick.
Ans: b) 6.28x104 N
B is the Bulk Modulus
When water freezes, it expands by about 9%.
What pressure increase would occur inside your automobile engine block if the water in it froze?
(The bulk modulus of ice is 2.00x109 N/m2 )
Ans: 1.65 x 108 N/m2