Is friction real? Once, with the quiet certainty of someone who just stayed up all night in the company of equations describing concrete, my college roommate told me that friction was made up. Now, ...

Eunice Millán prepares to measure the force of friction in a physics lab at Woodrow Wilson High School in Camden, New Jersey, which requires all students to take physics to graduate. (Tara García ...

In today's episode, Shini tells us about Static and Kinetic friction. Why is it hard to move a heavy bookcase across a carpeted floor? And why is it easier to keep it moving than it was to get it ...