CALC? A bird flies in the xy-plane with a velocity vector given by and ? = 4.0 m/s2. The positive y-direction is vertically upward. At t = 0 the bird is at the origin. (a) Calculate the position and acceleration vectors of the bird as functions of time. (b) What is the bird’s altitude ( y-coordinate) as it flies over x = 0 for the first time after t = 0?

AAEC 2104 CHAPTER 3: THE TIME VALUE OF MONEY $1 today is worth more than $1 in the future o 3 main reasons: Risk You may not receive that $1 in the future Inflation Increase in the general price level Opportunity cost You can do things with that $1 today TIME VALUE PROBLEMS Future value (lump sum) Present value (lump sum) Annuities and loan payments Future value of annuities o Annuity- constant payment over a period of time o Dollars/year or dollars/month Present value of annuities Perpetuities-constant stream of payments, forever