MECHANICAL PROPERTIES OF SOLIDS
Very Short Question Answers
Q1. State Hooke's law of elasticity.
Ans.Hooke’s law of elasticity: With in elastic limit, the stress is directly proportional to strain.
$Stress \propto strain$
$stress\, =\, K\, (strain)$
Q2. State the units and dimensions of stress.
Ans. S.I Unit- $Pascal$ ,(or) $N/\,m^{2}$ Dimensional Formula :$\,\,[M^{1}\,L^{-1}\,T^{-2}\,]$
Q3. State the units and dimensions of modulus of elasticity.
Ans. S.I Unit- $Pascal$ ,(or) $N/\,m^{2}$ Dimensional Formula :$\,\,[M^{1}\,L^{-1}\,T^{-2}\,]$
Q4. State the units and dimensions of Young's modulus.
Ans. S.I Unit- $Pascal$ ,(or) $N/\,m^{2}$ Dimensional Formula :$\,\,[M^{1}\,L^{-1}\,T^{-2}\,]$
Q5. State the units and dimensions of modulus of rigidity.
Ans. S.I Unit- $Pascal$ ,(or) $N/\,m^{2}$ Dimensional Formula :$\,\,[M^{1}\,L^{-1}\,T^{-2}\,]$
Q6. State the units and dimensions of Bulk modulus.
Ans. S.I Unit- $Pascal$ ,(or) $N/\,m^{2}$ Dimensional Formula :$\,\,[M^{1}\,L^{-1}\,T^{-2}\,]$
Q7. State the examples of nearly perfect elastic and plastic bodies.
Ans.Nearly perfect elastic bodies: quartz, phosphor – bronze,
Nearly perfect plastic bodies: clay, putty, dough, butter.