The wheel of a car has a radius of 0.400 m. The engine of the car applies a torque of 415 N·m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road must be applying a force of static friction to the wheel that produces a countertorque. Moreover, the car has a constant velocity, so this countertorque balances the applied torque. What is the magnitude of the static frictional force?

Problems and applications q3 suppose the demand for french bread falls. illustrate the effect this has on the market for french bread. demand supply price of french bread quantity of french bread d 1 d 2 supply producer surplus in the market for french breadincreases . illustrate the effect the quantity change in french bread has on the market for flour. demand supply price of flour quantity of flour d 1 d 2 s 1 s 2 producer surplus in the market for flour .

4. suppose that pollution in a neighborhood comes from two factories, with marginal benefit curves given by mb1 = 12 – p1 and mb2 = 8 – p2. the level of pollution in the neighborhood is given by p = p1 + p2. the government wants to limit pollution by instituting a pollution-rights market. the government’s desired level of p is 10, so it prints 10 pollution rights and offers them for sale to the firms. a)find the equilibrium selling price of a pollution right, as well as the allocation of rights (and hence pollution levels) across the two factories. b)repeat part (a) for the case where the government’s desired level of pollution equals 14. c)comment on the usefulness of a pollution rights market in achieving efficient levels of pollution abatement.

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