A piano wire 0.80mm long and 0.80mm in diameter is fixed on one end.

The other end is wrapped around a tuning peg 3.0mm in diameter.

Initially the wire, whose Young's modulus is 2X10^10,

has a tension of 20N .

Find the tension in the wire after the tuning peg has been turned

through one complete revolution

The other end is wrapped around a tuning peg 3.0mm in diameter.

Initially the wire, whose Young's modulus is 2X10^10,

has a tension of 20N .

Find the tension in the wire after the tuning peg has been turned

through one complete revolution