From this, the team concluded that the coefficient of static rolling friction is greater that the coefficient of dynamic rolling friction. You’re probably wondering what they mean by a rolling ruck?

It's calculated as Pf = P x Fr Static friction is the force needed to initiate movement and is calculated using the above formula, but substituting the coefficient of rolling friction with the ...

For the first time, ETH Zurich Materials Scientists have measured the rolling friction of microscopic, micrometer-sized particles. These measures allow them to better understand common items like ...

This friction is many times higher than the rolling friction and it explains the dramatic thickening of the suspensions. The researchers were able to derive the coefficients for the rolling and ...