Question $4$ of $4$

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Current Attempt in Progress

The bar clamp is being used to clamp two boards together while the glue between them cures. What torque M must be applied to the handle of the screw in order to produce a $77-$Ib compression between the boards? The $0\mathrm{.}375-$in$.-$diameter single$-$thread screw has $10$ square threads per inch, and the effective coefficient of friction is $0\mathrm{.}15.$ Neglect any friction in the pivot contact at $C.$ What torque $M^{\text{'}}$ is required to loosen the clamp?

Answers:

$M=ilb-in.$

$M^{\text{'}}=\sqrt[\phantom{2}]{i},lb-in.$

iQuestion $4$ of $4$

$/1$

Current Attempt in Progress

The bar clamp is being used to clamp two boards together while the glue between them cures. What torque M must be applied to the handle of the screw in order to produce a $77-$Ib compression between the boards? The $0\mathrm{.}375-$in$.-$diameter single$-$thread screw has $10$ square threads per inch, and the effective coefficient of friction is $0\mathrm{.}15.$ Neglect any friction in the pivot contact at $C.$ What torque $M^{\text{'}}$ is required to loosen the clamp?

Answers:

$M=ilb-in.$

$M^{\text{'}}=\sqrt[\phantom{2}]{i},lb-in.$

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