Using moon's rotational energy on earth

In summary, tapping the moon's rotational energy could potentially provide us with 3.15 x 10^23 J of energy. If the world uses five times as much energy yearly, the moon's rotation could provide energy for 158 years. It seems like a cost-effective energy source to invest in, but it is important to consider what would happen after 158 years and how the energy would be harvested and released.
  • #1
henry3369
194
0

Homework Statement


Suppose that some time in the future we decide to tap the moon's rotational energy for use on earth. In additional to the astronomical data in Appendix F in the textbook, you may need to know that the moon spins on its axis once every 27.3 days. Assume that the moon is uniform throughout.1. How much total energy could we get from the moon's rotation?
E = 3.15 x 10^23 J

2. The world presently uses about 4.0×1020J of energy per year. If in the future the world uses five times as much energy yearly, for how many years would the moon's rotation provide us energy?
t = 158 years

3. In light of your answer, does this seem like a cost-effective energy source in which to invest?

Homework Equations

The Attempt at a Solution


I'm just curious as to why this would not be a cost effective energy source. If the moon complete one rotation every 27.3 days, and as a result, it provides energy for 158 years, how is that not cost effective?
 
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  • #2
What happens after 158 years?

How did you get that number? How would you harvest this energy to use it?
 
  • #3
mfb said:
What happens after 158 years?

And how did you get that number? And how would you release this energy to use it?

Future energy use = 5* (4.0×10^20)= 2 x 10^21
3.15 x 10^23/ 2x10^21 = 158 years
 

FAQ: Using moon's rotational energy on earth

What is the concept of using moon's rotational energy on earth?

The concept involves harnessing the rotational energy of the moon and converting it into usable energy on earth.

How can we use the moon's rotational energy on earth?

There are various proposed methods, such as using tidal energy, lunar solar power, and gravitational energy.

What are the potential benefits of using moon's rotational energy on earth?

The benefits include a renewable and sustainable source of energy, reduced dependence on fossil fuels, and a cleaner environment.

Are there any challenges or limitations to using moon's rotational energy on earth?

Some challenges include the high cost of implementing the technology, technical difficulties in capturing and storing the energy, and the need for further research and development.

Is using moon's rotational energy on earth a viable solution for our energy needs?

While it is still a concept and there are challenges to overcome, it has the potential to be a viable solution in the future as we continue to explore and develop new technologies.

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