Register
A person does 50j of work to lift a crate using a pulley. The plley's work output is 42j. What is the pulleys mechanical efficiency?
177k views
2 votes
A person does 50j of work to lift a crate using a pulley. The plley's work output is 42j. What is the pulleys mechanical efficiency?

User GlenRSmith
by
8.1k points

1 Answer

4 votes
(42/50)*100=84%

Because efficiency =(Useful/total)*100

Hope this helps!
User Sweetzyl Pili
by
8.7k points
← Prev Question Next Question →

Related questions

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Other Questions

At sea level, water boils at 100 degrees celcius and methane  boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
what is a device that transforms thermal energy to mechanical energy
What is the minimum resistance which can be made using five resistors each of 1/5
Link Copied!