500 kg piano is being lowered to the ground with a rope. The tension on the rope is 4000 N, and the air friction acting on the piano is 500 N . When the piano passes by a window that is 30 m above the ground, the piano is moving at 2 m/s.
Draw a FBD for the piano
What is the net force on the piano?
What is the acceleration of the piano?
How long will it take the piano to reach the ground?
