An auto race is held on a circular track. A car completes one lap in a time of 19.8 s, with an average tangential speed of 43.4 m/s. Find the following.
(a) the average angular speed
(b) the radius of the track
i know that tangential speed is T = r * theta
where r is the radius and theta is the distance.
however, i don't have r?
how do i solve for this.
also must i convert this 43.4 m/s into revolutions and then radians?