A close-coiled helical spring of 10 active turns is made of 8 mm diameter steel wire. The mean coil diameter is 10 cm. If G = 80 GPa for the material of spring, the extension of spring under a tensile load of 200 N will be nearly

A close-coiled helical spring of 10 active turns is made of 8 mm diame

1.	A close-coiled helical spring of 10 active turns is made of 8 mm diameter steel wire. The mean coil diameter is 10 cm. If G = 80 GPa for the material of spring, the extension of spring under a tensile load of 200 N will be nearly
A.	40 mm
B.	45 mm
C.	49 mm
D.	53 mm
Answer» D. 53 mm

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A close-coiled helical spring of 10 active turns is made of 8 mm diameter steel wire. The mean coil diameter is 10 cm. If G = 80 GPa for the material of spring, the extension of spring under a tensile load of 200 N will be nearly

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