Mechanical Prop...

The Young's modulus of the material of a rod is $$20 \times 10^{10}$$ pascal. When the longitudinal strain is 0.04%, The energy stored per unit volume is

A woman with a mass of $$65\ kg$$ puts all her weight on one heel of her high-heel shoe. The cross-sectional area of the heel is $$1\ cm^{2}$$. According to the table, if she is standing on a pane of glass that is flat against the ground, does the glass break :

A metal wire of length $$1\ m$$ and cross-section area $$2\ mm^{2}$$ and Young's modulus of elasticity $$Y=4\times 10^{11}\ N/m^{2}$$ is stretched by $$2\ mm$$. Then

A force F doubles the length of wire of cross-section a. The Young modulus of wire is

An elastic metal rod will change its length when it

If the speed of longitudinal wave equals $$10$$ times the speed of the transverse waves in a stretched wire of material which has modulus of elasticity E, then the stress in the wire is

Two wires of the same material have masses in the ratio 3:4. The ratio of their extensions under the same load if their lengths are in the ratio 9:10 is

In case of bending of a beam, depression $$\delta$$ depends on Young modulus of elasticity $$Y$$ as

A steel bar of cross-section $$500$$ mm and length $$1$$ m acted upon by two forces as shown If Young modulus of elasticity of steel is $$200 \times 10^9$$ $$N/m^2$$ then elongation of the rod is 

The extension produced in a wire by the application of a load is $$3.0$$ mm. The extension produced in a wire of the same material and length but half the radius by the same load is: