1.
When a wheel rolls without slipping, the velocity of the bottom point, where the wheel contacts
with the ground, is zero.
True or False
Solution
True
"If the wheel is rolling without slipping, what's the velocity of the point at the base of the
wheel?? It is... zero! Convince yourself that the velocity must be zero. Since if it wasn't zero, the
wheel wouldn't be rolling without slipping. So the wheel is rolling without slipping if and only if
the point at the base has velocity zero, i.e. if and only if the tangential speed equals the speed of
the center of mass."