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کلاس پنجم - اهرم
کلاس پنجم
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در زندگی روزمره‌ی ما ابزار آلاتی وجود دارد که در تعمیرات لوازم مکانیکی از آن‌ها استفاده می‌کنیم. این ابزارآلات در گروه ماشین‌های ساده‌اند و اهرم نام دارند. در این بخش اهرم را توضیح می‌دهیم.

ماشین‌ها ساده و مرکب هستند. هنگام کار کردن با ماشین‌های ساده، کمیت‌های انرژی و کار ثابت می‌مانند و ممکن است نیرو، توان، سرعت، مسافت تأثیر نیرو و یا جهت نیرو تغییر کنند. اهرم یک ماشین ساده است که زیاد مورد استفاده قرار می‌گیرد.

 

اهرم چیست؟

اهرم‌ها نوع دیگری از ماشین‌های ساده هستند كه با آن‌ها می‌توانیم كارها را آسان‌تر انجام دهیم. با كمك اهرم می‌توان چیزهای سنگین را آسان‌تر جا به جا كرد. اهرم‌ها شکل‌های مختلف دارند.

اهرم اولین بار توسط دانشمند یونانی، اَرَشْمیدُس در سال 260 قبل از میلاد توصیف شده است. او گفته است:

 





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یکشنبه 20 دی 1394
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چهارشنبه 2 مرداد 1398 09:19 ق.ظ
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شنبه 29 تیر 1398 08:13 ب.ظ
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شنبه 15 تیر 1398 03:54 ب.ظ
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His smile was decadent, his eyes were filled up with lust,
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دوشنبه 10 تیر 1398 06:48 ب.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.
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یکشنبه 9 تیر 1398 07:00 ب.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.
I'm having black coffee, he's possessing a cappuccino. He is handsome.
Brown hair slicked back, glasses that fit his face, hazel eyes and the prettiest
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یکشنبه 9 تیر 1398 06:25 ب.ظ
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شنبه 8 تیر 1398 12:07 ق.ظ
We're having coffee at Nylon Coffee Roasters on Everton Park in Singapore.
I'm having black coffee, he's developing a
cappuccino. He's handsome. Brown hair slicked back, glasses that suit his face, hazel eyes and the prettiest
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we want for the future, what we're interested in on another person. He starts saying that
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‘Why Andrew? You're so handsome. I'd never reject you ', I believe that He smiles at me, biting his
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‘Oh, I wouldn't know. Everything happens for good reason right.
But tell me, can you reject me, does one Ana?' He said.


‘No, how could I?' , I replied

"So, would you mind if I kissed you currently?' he stated as I receive far better him and kiss him.

‘When don't ask, simply do it.' I reply.

‘I love the way you think.' , he said.

For now, I start scrubbing my high heel in the leg, massaging it slowly. ‘What can that suits you in females? And, Andrew, don't spare me the details.' I ask.

‘I like determined women. Someone you will never know what we want. Somebody who won't say yes although I said yes. Someone who's not scared of trying something mroe challenging,' he says. ‘I'm never afraid when attemping something totally new, especially in relation to making new stuff in the sack ', I intimate ‘And I adore women that are direct, who cut with the chase, like you recently did. To become
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شنبه 1 تیر 1398 10:51 ب.ظ

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شنبه 1 تیر 1398 10:51 ق.ظ
WOW just what I wwas searching for. Came here by searching for
اهرم
 
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