A wire is suspended by one end. At other end a weight equivalent to 20, N force is applied. If incre

English

Gujarati

Hindi

8.Mechanical Properties of Solids

medium

A wire is suspended by one end. At the other end a weight equivalent to $20\, N$ force is applied. If the increase in length is $1.0\, mm,$ the ratio of the increase in energy of the wire to the decrease in gravitational potential energy when load moves downwards by $1\, mm,$ will be

A

$1$

B

$\frac{1}{4}$

C

$\frac{1}{3}$

D

$\frac{1}{2}$

Solution

(d) Ratio of work done $=$ $\frac{{1/2Fl}}{{Fl}} = \frac{1}{2}$

Standard 11

Physics

Share

Similar Questions

Given : $\sigma$ is the compressibility of water, $\rho$ is the density of water and $K$ is the bulk modulus of water. What is the energy density of water at the bottom of a lake $‘h’$ metre deep ?

hard

A uniform metal rod of $2\, mm^2$ cross section fixed between two walls is heated from $0\,^oC$ to $20\,^oC$. The coefficient of linear expansion of rod is $12\times10^{-6}/^oC$. Its Young's modulus of elasticity is $10^{11} \,N/m^2$. The energy stored per unit volume of rod will be ……. $J/m^3$

medium

If a spring extends by $x$ on loading, then the energy stored by the spring is (if $T$ is tension in the spring and $k$ is spring constant)

medium

(AIIMS-1997)

When strain is produced in a body within elastic limit, its internal energy

easy

What is called elastic potential energy ? Write its different formulas.

medium