The adjacent graph shows the extension () of a wire of length 1m suspended from the top of a roof at one end and with a load W connected to the other end. If the cross-sectional area of the wire is , calculate the Young's modulus of the material of the wire.
A wire is stretched by by a certain force . Another wire of same material whose diameter and length are double to the original wire is stretched by the same force. Then its elongation will be
Two wires of the same material and length but diameters in the ratio 1 : 2 are stretched by the same force. The potential energy per unit volume for the two wires when stretched will be in the ratio
A body of mass is suspended to an ideal spring of force constant k. The expected change in the position of the body due to an additional force F acting vertically downwards is
A weight of is suspended by vertical wire of length . The area of cross-section of wire is . When the load is removed, the wire contracts by . The Young's modulus of the material of wire will be