Two objects are dropped from rest from the same height. object a falls through a distance da and during a time t, and object b falls through a distance db during a time 2t. if air resistance is negligible, what is the relationship between da and db? da=1/4dbit cannot be determined from the information given. da=4dbda=2dbda=1/2db

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?