85. A rigid bar of mass 15 kg is supported symmetrically by three wires each 2.0 m long . Those at each end are of copper and the middle one is of iron . Determine the ratio of their diameters if each is to have the same tension .

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Q. A rigid bar of mass 15 kg is supported symmetrically by three wires each 2.0 m long. Those at each end are of copper and the middle one is of iron. Determine the ratios of their diameters if each is to have the same tension.

A rigid bar of mass 15 kg is supported symmetrically by three wires each 2.0 m long. Those at each end are of copper and the middle one is of iron. Determine the ratio of their diameters if each is to have the same tension.

Q. A rigid bar of mass

15 k g

is supported symmetrically by three wires each

2.0 m

long. Those at each end are of copper and the middle one is of iron. Determine the ratios of their diameters if each is to have the same tension.

Q. A rigid bar of mass

15 k g

is supported symmetrically by three wires each

2 m

long. Those at each end are of copper and the middle one is of iron. Determine the ratio of their diameters if each is to have the tension? (Given E for copper =

110 \times 10^{9} N / m^{2}

and E for iron =

190 \times 10^{9} N / m^{2}

Q. A rigid bar of mass

M

is supported symmetrically by three wires each of length

L

. Those at each end are of copper and the middle one is of iron. The ratio of their diameters, if each is to have the same tension, is equal to:

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