A 3.50-kN piano is lifted by three workers at constantspeed to an apartment 25.0 m above
Chapter 8, Problem 39(choose chapter or problem)
A 3.50-kN piano is lifted by three workers at constantspeed to an apartment 25.0 m above the street using apulley system fastened to the roof of the building. Eachworker is able to deliver 165 W of power, and the pulleysystem is 75.0% efficient (so that 25.0% of the mechanicalenergy is transformed to other forms due to frictionin the pulley). Neglecting the mass of the pulley,find the time required to lift the piano from the streetto the apartment.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer