A piece of elastic was stretched by 24% to a length of 31 cm .find its unstretched original length

If a wire is stretched to its length, then

A wire of resistance 10 Omega is stretched so that its length is thrice its original length. The new resistance is-

A wire of resistance R is stretched till its length becomes n times its original length. What will be its new resistance?

A metal wire of resistance 6Omega is stretched so that its length is increased to twice its original length. Calculate its new resistance.

A metal wire of resistance 62 Ohms is stretched so that its length increased to twice of original length. Calculate its new resistance

An elastic spring of unstretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. Work done during the second stretching is

An elastic spring of length L and spring constant K is stretched by a length x. It is then again stretched to a length y. The work done in the second case will be