Convert 185 lbs, 23 in to Joules

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In summary, to convert 185 lbs to joules, you need to divide the weight in pounds by 2.20462 to get the weight in kilograms, and then use the formula E=mc^2 where E is energy in joules, m is mass in kilograms, and c is the speed of light. The conversion factor for pounds to joules is approximately 4.44822 x 10^8. Online conversion calculators can also be used, but double checking is recommended. This conversion is accurate for converting mass into energy using the equation E=mc^2, but not for other types of energy. It is specific to converting 185 lbs and 23 in into joules, and using different weights and lengths
  • #1
gator6688
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Homework Statement



How much energy in joules lifting 185 lbs, 23 inches.

Homework Equations





The Attempt at a Solution

 
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  • #2
gator6688 said:

Homework Statement



How much energy in joules lifting 185 lbs, 23 inches.

Homework Equations



The Attempt at a Solution


Welcome to PF.

How would you approach the problem?
 
  • #3


To convert 185 lbs to kilograms, we can use the conversion factor 1 lb = 0.453592 kg. Therefore, 185 lbs = 83.914 kg.

To convert 23 inches to meters, we can use the conversion factor 1 inch = 0.0254 meters. Therefore, 23 inches = 0.5842 meters.

To calculate the potential energy, we can use the equation PE = mgh, where PE is the potential energy, m is the mass, g is the acceleration due to gravity (9.8 m/s^2), and h is the height.

Substituting the values, we get PE = (83.914 kg)(9.8 m/s^2)(0.5842 m) = 487.07 joules. Therefore, the energy required to lift 185 lbs, 23 inches is 487.07 joules.
 

1. How do I convert 185 lbs to joules?

To convert from pounds to joules, you need to first convert the weight in pounds to kilograms by dividing by 2.20462. In this case, 185 lbs is equal to approximately 83.91 kg. Then, you can use the formula E=mc^2, where E is energy in joules, m is mass in kilograms, and c is the speed of light (299,792,458 m/s). Plugging in the values, you get E = (83.91 kg)(299,792,458 m/s)^2 = 7.535 x 10^18 joules.

2. What is the conversion factor for pounds to joules?

The conversion factor from pounds to joules is approximately 4.44822 x 10^8. This means that for every 1 pound, there are approximately 4.44822 x 10^8 joules.

3. Can I use a conversion calculator for this conversion?

Yes, there are many online conversion calculators that can help you convert from pounds to joules. Just make sure to double check the calculations and units to ensure accuracy.

4. Is this conversion accurate for all types of energy?

This conversion is specifically for converting mass into energy, using the famous equation E=mc^2. It is not accurate for converting other types of energy, such as potential or kinetic energy, into joules. For those conversions, different equations and factors would need to be used.

5. Can I use this conversion for any weight and length measurements?

No, this conversion is specifically for converting 185 lbs and 23 in into joules. Using different weights and lengths would result in different conversions, as weight and length are both factors in the equation E=mc^2.

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