A 137-Kg Block Is Held in Place Against the Spring by by a 74-N

question 22

Multiple Choice

A 1.37-kg block is held in place against the spring by a 74-N horizontal external force (see the figure) . The external force is removed, and the block is projected with a velocity v₁ = 1.2 m/s upon separation from the spring. The block descends a ramp and has a velocity at the bottom. The track is frictionless between points A and B. The block enters a rough section at B, extending to E. The coefficient of kinetic friction over this section is 0.24. The velocity of the block is at C. The block moves on to D, where it stops. The initial compression of the spring is closest to

• A) 2.7 cm.
• B) 1.4 cm.
• C) 0.96 cm.
• D) 5.3 cm.
• E) 3.6 cm.

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Definitions:

Workers Without Jobs

Individuals who are actively seeking employment but are unable to find work.

Structural Unemployment

Unemployment that results because the number of jobs available in some labor markets is insufficient to provide a job for everyone who wants one.

U-5 Measure

The U-5 Measure is a broader definition of unemployment than the standard, including not only those actively seeking work but also discouraged workers and others marginally attached to the labor force.

Marginally Attached Workers

Individuals who are not in the labor force but want and are available to work, and have looked for a job sometime in the past 12 months but not in the four weeks preceding the survey.