Normally, a plane moves along three rotational axes. “Inertia coupling” takes place when the plane inadvertently moves on two at the same time, usually resulting in loss of control.

Bring up the subject of time, torque, and inertia with a mechanical engineer, and his or her eyes are likely to light up. Most engineers, during their undergraduate career, get a firm grounding in ...

Physicists have spent decades treating mass as something the universe simply hands to particles, a property encoded in ...