PURPOSE: Analyze three configurations for the crane boom.

DESCRIPTION: The three configurations pictured may be readily set up and analyzed. The dynamometer measures tension in the rope; an internal spring scale measures the compression in the boom.

SUGGESTIONS:

REFERENCES: (PIRA 1J40.70) See Demonstration Reference File for further information.

EQUIPMENT: Pre-assembled crane boom including pulley, clamps, rods, rope and chain, with 100 Newton scale and two-kilogram mass, as photographed.

SETUP TIME: 5 min.