NEET Physics Mechanical Properties Of Solids MCQs

The Young's modulus of a material is $2 imes 10^{11} \, Pa$. A wire of this material with a cross-sectional area of $1 \, mm^2$ and length $1 \, m$ is stretched by $1 \, mm$. What is the force applied to the wire?

A wire is stretched by a force F, storing strain energy U. If the force is doubled, the strain energy stored becomes:

What are the dimensions of stress?

If force has dimensions $[MLT^{-2}]$ and area has dimensions $[L^2]$, what are the dimensions of stress?

Pressure and stress have the same dimensions. If pressure is force per unit area, which of the following represents the dimensions of stress?

The unit of stress in the SI system is Pascal (Pa), which is equivalent to $N/m^2$. Knowing that Newton (N) has dimensions $[MLT^{-2}]$ and $m^2$ has dimensions $[L^2]$, what are the dimensions of stress?

Which physical quantity has the dimensions $[ML^{-1}T^{-2}]$?

A bob of mass 10 kg is attached to wire 0.3 m long. Its breaking stress is $4.8 imes {10^7}N/{m^2}$. The area of cross section of the wire is ${10^{ - 6}}{m^2}$. The maximum angular velocity with which it can be rotated in a horizontal circle

The general form of potential energy curve for atoms or molecules can be represented by the following equation $U\left( R \right) = \frac{A}{{{R^n}}} - \frac{B}{{{R^m}}}$ . Here, R is the interatomic or molecular distance, A and B are coefficients, $n$ and $m$ are the exponents. In the above equation

A wire can be broken by applying a load of 200 N. The force required to break another wire of the same length and same material, but double in diameter, is