Work out tangential velocity instantly with clear inputs, formula shown and shareable results.
Every point on a rotating body shares the same angular velocity but not the same linear speed: v = omega.r, so the rim moves faster than the hub. Converting 1200 rpm gives 125.7 rad/s, and at 0.15 m from the axis that is 18.85 m/s. This is why grinding wheels are rated by surface speed rather than rpm.
Angular velocity from rpm
omega = 2 pi x rpm / 60
Tangential speed
v = omega x r
Because tangential speed scales with radius, and it is the surface speed that determines whether the material tears itself apart.
No. Angular speed is shared across the whole body; tangential speed depends on how far out you measure.