Aperson on the second floor takes the elevator up 5 floors, crosses to the other side of the building then takes the elevator on that side down by 2. the height of each floor is 3.5 m and the width of the building is 21 m. what is the person's displacement?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?