posted by JOHN .
A fan blade is rotating with a constant angular acceleration of +13.7 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?
The magnitude of the tangential acceleration is ra=13.7rad/s^2
It equals the gravitational acceleration, which is 9.8m/s^2
From there, just set the two equal to one another: 13.7r=9.8