How gravity causes a perfectly spherical ball ... as the ramp flattens out, the more likely the object stops. The transition from not-rolling-to-rolling, which happens at a critical angle of ...

How gravity causes a perfectly spherical ball to roll down an inclined ... down an incline versus a paper towel roll. Four objects at various ramp angles are shown far from or close to criticality.

Basic physics quickly gets messy in an irregular world, scientists discover in new research on the old problem of a ball ...

How gravity causes a perfectly spherical ball ... as the ramp flattens out, the more likely the object stops. The transition from not-rolling-to-rolling, which happens at a critical angle of ...

How gravity causes a perfectly spherical ball ... the ramp flattens out, the more likely the object will stop. The transition from not-rolling to rolling, which happens at a critical angle of ...