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?

Answer 1

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
r=.7313m