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Question
A spring is stretched by applying a load to its free end. The strain produced in the spring is
A spring is stretched by applying a load to its free end. The strain produced in the spring is
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Solution
The correct option is D Longitudinal and shear
In case of a bar, the axial force due to application of load acts normal to the cross section and hence leads to longitudinal strain. However in case of spring, the force acts along the cross sectional area of the spring , instead of being perpendicular, resulting in the development of torsion which leads to the development of shear strain. Also the spring stretches axially, so there is also a longitudinal strain. Hence option C is correct.
In case of a bar, the axial force due to application of load acts normal to the cross section and hence leads to longitudinal strain. However in case of spring, the force acts along the cross sectional area of the spring , instead of being perpendicular, resulting in the development of torsion which leads to the development of shear strain. Also the spring stretches axially, so there is also a longitudinal strain. Hence option C is correct.
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