Physics, 22.07.2019 17:10, bean9840

A4.38-kn piano is lifted by three workers at a constant speed to an apartment 30.4 m above the street using a pulley system fastened to the roof of the building. each worker is able to deliver 132 w of power, and the pulley system is 75.0% efficient (so that 25.0% of the mechanical energy is lost due to friction in the pulley). neglecting the mass of the pulley, find the time required to lift the piano from the street to the apartment.

Answers: 3

Show answers

Other questions on the subject: Physics

Physics, 21.06.2019 16:00, pareshrr

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

Answers: 2

continue

Physics, 22.06.2019 12:30, ayoismeisjjjjuan

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Answers: 3

continue

Physics, 22.06.2019 15:30, pandapractice6834

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Answers: 1

continue

Physics, 22.06.2019 18:00, Zaydblackwood06

The photo shows sugar dissolved into a solution with excess sugar at the bottom of the jar this type of solution is classified as a. unsaturated b. compound c. saturated d. plasma

Answers: 1

continue

Do you know the correct answer?

A4.38-kn piano is lifted by three workers at a constant speed to an apartment 30.4 m above the stree...