Mechanical Prop...

A rubber cord 10 m long is suspended vertically. How much does it stretch under its own weight? (Density of rubber is 1500 kg/m³, Y = 5 × 10⁸ N/m 2, g = 10 m/s²)

A steel wire of cross-sectional area 3 × 10^–6 m² can withstand a maximum strain of 10^–3. Young\'s modulus of steel is 2 × 10¹¹ N/m². The maximum mass the wire can hold is (Take g = 10 m/s²)

The Young\'s modulus of a rubber string 8 cm long and density 1.5 kg/m³ is 5 × 10⁸ N/m², is suspended on the ceiling in a room. The increase in length due to its own weight will be

One end of a horizontal thick copper wire of length 2L and radius 2R is welded to an end of another horizontal thin copper wire of length L and radius R. When the arrangement is stretched by applying forces at two ends, the ratio of the elongation in the thin wire to that in the thick wire is

If the length of a wire is reduced to half, then it can hold the load

There are two wires of same material and same length while the diameter of second wire is 2 times the diameter of first wire, then ratio of extension produced in the wires by applying same load will be

When the length of a wire having cross-section area 10^–6 m² is stretched by 0.1%, then tension in it is 100 N. Young\'s modulus of material of the wire is

Two wires of equal lengths are made of the same material. Wire A has a diameter that is twice as that of wire B. If identical weights are suspended from the ends of these wires, the increases in length is

Why the spring is made up of steel in comparison of copper?

Steel and copper wires of same length are stretched by the same weight one after the other. Young\'s modulus of steel and copper are 2 × 10¹¹ N/m² and 1.2 × 10¹¹ N/m². The ratio of increase in length