A Block of Mass M = 8

question 23

Multiple Choice

A block of mass m = 8.40 kg, moving on a horizontal frictionless surface with a speed 4.20 m/s, makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 8.40 block recoils with a speed of 0.400 m/s. In the figure, the blocks are in contact for 0.200 s. The magnitude of the average force on the 8.40-kg block, while the two blocks are in contact, is closest to

• A) 193 N.
• B) 185 N.
• C) 176 N.
• D) 168 N.
• E) 160 N.

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Definitions:

Average Total Cost

The total cost of production divided by the number of units produced, representing the cost per unit of output.

Marginal Revenue

The boost in income from the sale of an additional unit of a product or service.

Demand

The desire and willingness of consumers to purchase a particular good or service at various prices.

MC > MR

A condition where the marginal cost of producing an additional unit is greater than the marginal revenue earned from selling it, suggesting a decrease in production might increase profit.