The two thigh bones (femurs),each of cross-sectional area $10 \; cm^{2}$,support the upper part of a human body of mass $40 \; kg$. Estimate the average pressure sustained by the femurs.
- A$2 \times 10^{5} \; N m^{-2}$
- B$6 \times 10^{5} \; N m^{-2}$
- C$4 \times 10^{6} \; N m^{-2}$
- D$8 \times 10^{6} \; N m^{-2}$
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$Assertion :$ Solids are least compressible and gases are most compressible.
$Reason :$ Solids have a definite shape and volume,but gases do not have either a definite shape or a definite volume.
$Reason :$ Solids have a definite shape and volume,but gases do not have either a definite shape or a definite volume.
$A$ steel wire can sustain $100\,kg$ weight without breaking. If the wire is cut into two equal parts, each part can sustain a weight of ......... $kg$.
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View Solution$A$ wire of length $5 \,m$ is twisted through $30^{\circ}$ at its free end. If the radius of the wire is $1 \,mm$,the shearing strain in the wire is: (in $^{\circ}$)
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View SolutionMatch the following:
Column $I$ Column $II$ $A$. Hooke's law $1$. Tangential strain $B$. Shearing strain $2$. Temporary loss of elastic property $C$. Bulk strain $3$. Elastic limit $D$. Elastic fatigue $4$. $3$ times the linear strain
| Column $I$ | Column $II$ |
|---|---|
| $A$. Hooke's law | $1$. Tangential strain |
| $B$. Shearing strain | $2$. Temporary loss of elastic property |
| $C$. Bulk strain | $3$. Elastic limit |
| $D$. Elastic fatigue | $4$. $3$ times the linear strain |
What is the tangential stress on the cross-section $PQRS$?
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