"If you were obsessed with friction, you would have never discovered this law," Dr. Nowak said.
Then the empty jam jar begins its tussle with friction, edging haltingly forward.
All snow and ice sports, he explained to me, begin and end with friction.
When people washed their bodies, they generally used warm or cold water only, sometimes with friction.
"You can't just say mass helps, because it has to do with friction and air resistance.
Fingerprints are likely to be supplemented with friction prints of other ridges, probably palmprints and maybe footprints.
"Every change comes with friction," says Vos. "The existing taxi world has not been known for its flexibility.
In those small lakes where hydraulic effects dominate, steady flow conditions may be achieved through balance with friction.
"Wow," said the students, moving back as flames erupted from a tiny ember that an instructor created with friction.
More recently it has rippled with friction about the place of religion, and specifically evangelical Christianity, in public life.
Out of such innately inactive types Mr. Greenberg has woven a drama that crackles with friction and a muted suspense, stoked by the throb of stifled desires.
