Mr. Duong is riding the Drop Zone at Kemah. If Mr. Duong free falls for 5 seconds, how far will he fall? Hint: Gravity is 9.8 m/s2. 42.5 m 22.5 m 100.5 m 122.5 m 142.5 m

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?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr