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When the hands are stretched out from the body, the moment of inertia of the ice dancer

A string of length 2x is stretched by 0.1 x and the velocity of a transverse wave along it is v. When it is stretched by 0.4x , the velocity of the wave is

A string of length 2x is stretched by 0.1 x and the velocity of a transverse wave along it is v. When it is stretched by 0.4x , the velocity of the wave is

Three wires A,B and C are of the same length and cross section. They are each stretched by applying the same force to the ends. The wire A is stretched least and comes back to its original length when the stretching force is removed. The wire B is stretched more than A and also comes back to its original length when the stretching force is removed.The wire C is stretched most and remains stretched enen when stretching force is removed. The greatest Young's modulus of elasticity is possessed by the material of wire

When a long wire is stretched by 0.25 cm, the energy stored per unit volume is 0.2 Jm^(-3) . When it is stretched by 1 cm, the increases in potential energy per unit volume sotred in the wire is given by

When a spring is stretched by 3 cm, stored potential energy becomes u and when it is stretched by 6 cm potential energy becomes