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فیزیک دوم دبیرستان - قضیه کار و انرژی

فیزیک دوم دبیرستان

اموزش کامل فیزیک دوم برای دانش اموزان ایرانی هدف اصلی من است

یکشنبه 28 خرداد 1391

قضیه کار و انرژی

نویسنده: محمد مهدی نوریزاده   طبقه بندی: فصل چهارم، 

قضیه کار و انرژی

می دانید که وقتی کار انجام می شود، میزان انرژی جنبشی تغییر می کند. قضیه کار و انرژی رابطه کار و تغییر انرژی جنبشی را بیان می کند. انرژی جنبشی یک جسم از رابطه زیر به دست می آید.

K= ½ mv2

طبق قضیه کار و انرژی «کار برآیند نیروی وارد بر یک جسم در یک جابه جایی برابر است با تغییر انرژی جنبشی جسم در آن جابه جایی»

W = k2 – k1

W = ½ mv22 – ½ mv1

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