A machine is efficient when most of the input energy is converted into useful output energy, with minimal energy lost as heat or friction.
Related Questions:
- A car is moving with a constant speed along a straight road. Is there any work done on the car?
- Does the work done in raising a box up in a building depend upon how fast it is raised up? Through which path? To how much height?
- Work done on a body either speeds it up or slows it down. Keeping this in mind, explain how much work is done by centripetal force on an orbiting satellite?
- A car has kinetic energy ‘Eₖ’. By what factor would its kinetic energy change if its velocity is doubled?
- A bullet is fired from a gun, penetrates into a sand wall, and stops. Where does its kinetic energy go?
- How does using renewable energy sources contribute to reducing environmental impact compared to non-renewable sources?
- Will we eventually rely entirely on renewable energy sources? Why or why not?
- How can increasing the power of a machine impact its energy consumption?
- A perpetual engine has an efficiency equal to 1. Why will it not work?
- A person lifts a book and places it on a shelf. In which case is work done, and why?
- How does the work-energy theorem explain the relationship between work and kinetic energy?
- Why does a ball bounce lower after each bounce? Explain in terms of energy conversion.
- How does gravitational potential energy change when an object is taken from Earth to the Moon?
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