A bead is moving along the spoke of a wheel at constant speed u , the wheel rotates with uniform angular velocity w radians per second about an axis fixed in space , at t=0 the bead is in the x axis at the origin, find the velocity in t in POLAR coordinates
In the text book it says : first we have $r(t)= ut$? doesn't that mean $v = u$ is constant?
How did they obtain this result (it changes in time) if $v$ is constant? $v = u (r) + utw(\theta)$ (($r$) and ($\theta$) are the bases of the polar plane)