Using fig. 17.13, select the minimum-length boom required to hoist a load of 80,000 lb from a truck at ground level and place it on a platform 76 ft above the ground. the minimum allowable vertical distance from the bottom of the load to the boom point of the crane is 42 ft. the maximum horizontal distance from the center of rotation of the crane to the hoist line of the crane when lifting the load is 40 ft.

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

do you have any options?

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the answer is d

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the fed will purchase bonds from banks to inject money into the banking system. the banks can use these funds to provide loans to individuals and businesses.

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