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swimlife97 Group Title

If you are given time and distance, you can determine power if you know force. watts. energy. joules.

  • one year ago
  • one year ago

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  1. theEric Group Title
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    Well, watts are the units of power, and joules are the units of energy, and this question isn't going for you knowing units. It wants you to know which physical concept is missing from knowing the power. You're down to "force" or "energy." Do you have a guess and a reason?

    • one year ago
  2. theEric Group Title
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    Hint:\[P=\frac{W}{t}\]

    • one year ago
  3. theEric Group Title
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    Want another hint?

    • one year ago
  4. swimlife97 Group Title
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    yes please

    • one year ago
  5. theEric Group Title
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    Okay!\[W=F\ d\ cos(\theta)\]Put that in the power equation, if you need another hint.

    • one year ago
  6. swimlife97 Group Title
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    Is it force?

    • one year ago
  7. theEric Group Title
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    Why do you guess "force"?

    • one year ago
  8. swimlife97 Group Title
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    W=F d cos(θ) W is work in Joules; F is force through distance; Cos theta is cosine of an angle theta

    • one year ago
  9. theEric Group Title
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    So, you say the answer is force because, well, you need it. And I agree, you're totally right.

    • one year ago
  10. theEric Group Title
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    \[P=\frac{W}{t}=\frac{F\ d\ cos(\theta)}{t}\]so you know distance and time, you just need force. The equations can be telling!

    • one year ago
  11. swimlife97 Group Title
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    Okay thank you :)

    • one year ago
  12. theEric Group Title
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    You're welcome! :)

    • one year ago
  13. theEric Group Title
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    And congrats, because you did it! I just posted equations, haha.

    • one year ago
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