Mechanical Prop...

A wire elongates by l mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends,the elongation of the wire will be (in mm)

A wire extends by $$1 mm$$ when a force is applied. Double the force is applied to another wire of same material and length but of half the radius of cross section.The elongation of wire in mm will be         

A copper solid cube of $$60mm$$ side is subjected to a compressible pressure of 2.5 x 10$$^{7}$$ Pa. If the bulk modulus of copper is 1.25 x 10$$^{11}$$ pascals, the change in the volume of cube is                      

A sphere contracts in volume by $$0.01$$% when taken to the bottom of lake $$1km$$ deep. If the density of water is $$1gm/cc$$, the bulk modulus of water is

The Y of a material having a cross sectional area of $$1 cm$$ $$^{2}$$ is 2 x 10$$^{12}$$ dynes/cm$$^{2}$$. The force required to double the length of the wire is:           

An elongation of $$0.1$$% in a wire of cross-section $$10^{-6}m^{2}$$ causes a tension of $$100N$$. $$Y$$ for the wire is

One end of a wire $$2m$$ long and $$0.2cm$$$$^{2}$$ in cross section is fixed to a ceiling and a load of $$4.8kg$$ is attached to its free end. The elongation in the wire in mm is (if y $$=$$ 2.0 x 10$$^{11}$$ N.m$$^{-2}$$, g $$=$$10ms$$^{-2}$$)

The increase in pressure required to decrease the $$200$$ litres volume of a liquid by $$0.004$$% in kPa is : (bulk modulus of the liquid $$=$$ $$2100 MPa$$) 

An iron wire of length $$4m$$ and diameter $$2 mm$$ is loaded with a weight of $$8kg$$. If the young's modulus '$$Y$$' for iron is $$2$$ x $$10$$$$^{11}$$ N/m$$^{2}$$, then the increase in the length of the wire is        

The extension of a wire by the application of a load is $$0.3 cm$$. The extension in the wire of the same material but of double the length and half the radius of cross section in cm is