Q.

A square aluminium (shear modulus is 25 x 109Nm-2) slab of side 60cm and thickness 15 cm is subjected to a shearing force (on its narrow face) of 18.0 x 104N. The lower edge is riveted to the floor. The displacement of the upper edge is ______ μm.

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answer is 48.

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Detailed Solution

η=FAtanθ=FAxFA=ηxFℓ=xx=18×104×60×10260×102×15×102×25×109=48×106m=48μm

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