1.1.1 Using a program as a calculator Our first program will evaluate (1.1) for a specific choice of v0,g, and t. Choosing v0=5m/s and g=9.81m/s2 makes the ball come back after t=2v0/g1s. This means that we are basically interested in the time interval [0,1]. Say we want to compute the height of the ball at time t=0.6s. From (1.1) we have y=50.6219.810.62 This arithmetic expression can be evaluated and its value can be printed by a very simple one-line Python program: print 50.60.59.810.62 The four standard arithmetic operators are written as +,,, and / in Python and most other computer languages. The exponentiation employs a double asterisk notation in Python, e.g., 0.62 is written as 0.62 Our task now is to create the program and run it, and this will be described next