A Massless Meter Stick on a Horizontal Frictionless Table Top

question 6

Multiple Choice

A massless meter stick on a horizontal frictionless table top is pivoted at the 80-cm mark.A force is applied perpendicularly to the end of the stick at 0 cm, as shown.A second force (not shown) is applied perpendicularly to the stick at the 100-cm end of the stick.The forces are in the plane of the table top.If the stick does not move, the force exerted by the pivot on the stick:

• A)must be zero
• B)must be in the same direction as and have magnitude
• C)must be directed opposite to and have magnitude
• D)must be in the same direction as and have magnitude
• E)must be directed opposite to and have magnitude

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Definitions:

Direct Labour

The wages paid to workers directly involved in the production of goods or services, considered a variable cost.

Direct Materials

Raw materials that can be directly attributed to the production of specific goods or services.

Net Operating Income

The total profit of a business after operating expenses are subtracted from gross profit but before deducting interest and taxes.

Contribution Margin

The amount of revenue remaining after deducting variable costs, which can be used to cover fixed costs and contribute to profit.