Physics · Mechanics of Solids
A key having a square cross-section of side d/4 and length l is used to transmit torque T from a shaft of diameter d to the hub of a pulley. Assuming the length of the key to be equal to the thickness of the pulley, the average shear stress developed in the key is given by:
- 116Tld3
- 28Tld2✓
- 316Tld2
- 416Tld
Correct answer
8Tld2
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