Which object experiences no overall displacement during the 4.0 s interval shown?

Consider two masses and at the top of two frictionless inclined planes.  Both masses start from rest at the same height.  However, the plane on which sits is at an angle of 30° with the horizontal, while the plane on which sits is at 60°.  If the masses are released, which is going faster at the bottom of its plane?

A boat capable of 4 m/s in still water goes directly across a river with a current of 3 m/s. The river is 160 m wide. How far down stream does the boat move?

Refer to this table to answer the next question.The accompanying table represents the quantity produced, the total revenue, and the total cost of a firm operating in a perfectly competitive market. Quantity Total Revenue Total Cost 0 $0 $4000 1 $10,000 $12,000 2 $20,000 $16,000 3 $30,000 $27,000 4 $40,000 $38,000     Profits are maximized when the firm produces __________ unit(s).  

Assume that the price of capital is $15 and that the price of labor is $25.  Suppose this firm wants to produce 18 units, is using 3 units of capital and 2 units of labor the optimal method of production?  If not, should the firm use a more capital intensive or labor-intensive technology?  Show your work. 

Refer to the accompanying graph to answer this question.   Is this firm earning positive, negative, or zero economic profits?

Use the following scenario to answer this question.Barb’s Slo-Smoke is a barbecue stand in Memphis, Tennessee. It operates as a pop-up shop on weekends. Imagine that Barb’s minimum average total cost (ATC) is $8.75 and that its minimum average variable cost (AVC) is $6.75. Assume there are no barriers to entry into or exit from this market.   What is the minimum price at which Barb’s Slo-Smoke will continue to open for business on weekends?

Consider the following scenario to answer this question.Lidia’s Pizza is a restaurant located near a college campus. The restaurant attracts two distinct types of customers—college students and local residents. The owners are considering offering a student discount of $2 off a large pizza, which is regularly priced at $12. There are 1,000 students interested in purchasing a large pizza, with a maximum willingness to pay of $10. There are 3,000 local residents interested in purchasing a large pizza, with a maximum willingness to pay of $12. Assume that each customer, at most, will purchase one large pizza and the marginal cost is $6.   What is the difference in the amount of total consumer surplus if Lidia’s offers a large pizza at the single price of $10 instead of the previous single price of $12?  

Use the following scenario to answer this question.Barb’s Slo-Smoke is a barbecue stand in Memphis, Tennessee. It operates as a pop-up shop on weekends. Imagine that Barb’s minimum average total cost (ATC) is $8.75 and that its minimum average variable cost (AVC) is $6.75. Assume there are no barriers to entry into or exit from this market.   Barb’s Slo-Smoke will suffer a loss but still be better off producing than shutting down if the price is equal to  

  One benefit of price discrimination is that