We examine the one dimensional Schrodinger equation for V = 0. The solutions for a particular frequency are waves; however, because the Schrodinger equation is linear, we are able to add solutions to form a wave packet. From the example of a Gaussian wave packet, we see that both momentum and position can not be specified at the same time. The product of the position and momentum uncertainties is greater than or equal to hbar/2. For macroscopic objects the constraint due to the uncertainty principle is not significant.