Two Supports, Made of the Same Material and Initially of Equal

question 51

Multiple Choice

Two supports, made of the same material and initially of equal length, are 2.0 m apart.A stiff board with a length of 4.0 m and a mass of 10 kg is placed on the supports, with one support at the left end and the other at the midpoint.A block is placed on the board a distance of 0.50 m from left end.As a result the board is horizontal (that is, the downward force on each support is the same) .The mass of the block is:

• A)0 kg
• B)2.3 kg
• C)6.6 kg
• D)10 kg
• E)20 kg

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Definitions:

Job Turnover

The rate at which employees leave a workforce and are replaced by new employees.

Nominal Wage

The amount of money received by a worker per unit of time (hour, day, etc.); money wage.

Real Wage

The amount of goods and services a worker can purchase with his or her nominal wage; the purchasing power of the nominal wage.

Agency Shops

A workplace agreement where employees, whether or not they are union members, must pay union fees for the bargaining services the union provides.