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Question

A cube of sponge rubber with edge length 5 cm has a force of 2 N applied horizontally to the top face (parallel to an edge) while the bottom face is held fixed. If the top face is displaced horizontally through a distance of 1 mm, find the shear modulus for the sponge rubber.

A
S=7×104Nm2
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B
S=6×104Nm2
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C
S=4×104Nm2
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D
S=5×104Nm2
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Solution

The correct option is C S=4×104Nm2
η=FA×ln
=2×(100)25×5×5×1000100×1
=2×2×1055×2
S=4×104Nm2

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