As we discussed in class, a meter stick can be approximated by discrete set of masses connected by a massless rod. For a uniform meter stick, we can assume that all masses are the same and they are equally spaced. For example, if the meter stick is composed by N total particles, where N is a large whole number, each one will have mass M /N (where M is the total mass of the ruler) and the space between adjacent particles will be 1 / (N 1) meters