Final answer:
A lower U.S. dollar stimulates aggregate demand and affects the short-term aggregate supply curve.
Step-by-step explanation:
A lower U.S. dollar would stimulate aggregate demand by making exports cheaper and imports more expensive. It would mean higher prices for imported inputs throughout the economy, shifting the short-term aggregate supply curve to the left. The result could be a burst of inflation and, if the Federal Reserve were to run a tight monetary policy to reduce the inflation, it could also lead to recession.