Effect of time derivative of contact area on dynamic friction

Kazuo Arakawa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This study investigated dynamic friction during oblique impact of a golf ball by evaluating the ball's angular velocity, contact force, and the contact area between the ball and target. The effect of the contact area on the angular velocities was evaluated, and the results indicated that the contact area plays an important role in dynamic friction. In this study, the dynamic friction force F was given by F =μN +μη dA/dt, where μ is the coefficient of friction, N is the contact force, dA/dt is the time derivative of the contact area A, and η is a coefficient associated with the contact area.

Original languageEnglish
Article number241603
JournalApplied Physics Letters
Issue number24
Publication statusPublished - Jun 16 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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