According to the equation developed by de broglie, what happens to the wavelength of a particle as mass increases?

Explanation:

De Broglie related the wavelength to the magnitude of the momemtum of the particle, as follows:

Here h is the planck constant. The momemtum is directly proportional to the particle's mass. So, the wavelength of a particle is inversely proportional to its mass. Thus, as mass increases its wavelength decreases.

that would be because of both gravity and friction. so     c