Awind turbine is rotating counterclockwise at 0.626 rev/s and slows to a stop in 12.9 s. its blades are 17.9 m in length. what is the centripetal acceleration of the tip of the blades at t=0~\text{s}t=0 s?

276.5 m/s^2

Explanation:

The initial angular velocity of the turbine is

The length of the blade is

r = 17.9 m

So the centripetal acceleration is given by

At the instant t = 0,

So the centripetal acceleration of the tip of the blades is

an energy transformation flow diagram is shown

where is it ?