If the Displacement of an Object Is Given in SI

question 40

Multiple Choice

If the displacement of an object is given in SI units by Dx = -3 t + 4 t ²,at t = 2 s its velocity and acceleration are,respectively:

• A)positive,positive.
• B)positive,negative.
• C)negative,negative.
• D)negative,positive.

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Definitions:

Rate Variance

The difference between the actual rate paid for goods or services and the expected (or standard) rate, most often related to labor or materials.

Direct Labor-Hours

Sum of working hours of staff directly participating in the production process of an item.

Labor Rate Variance

This is the difference between the actual cost of labor and the budgeted or standard cost of labor used in manufacturing.

Direct Labor-Hours

The total hours worked by employees directly involved in the production process, used for allocating labor costs to products.