المشاركة الأصلية كتبت بواسطة zikodragon (المشاركة 223716) http://e6.img.v4.skyrock.net/e62/0xp...71_small_1.jpg مع العلم أن الإحتكاكات غير مهملة

1-[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image001.gif[/IMG] R

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image002.gif[/IMG][IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif[/IMG]يخضع S لقوتين :

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image004.gif[/IMG] - وزنه P

P

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image005.gif[/IMG] - تأثير السطح الأفقي R

-2 [IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image007.gif[/IMG]w(R)=

φ)/2+[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image009.gif[/IMG]=R.AB cos( w(R

نعلم أن K=tang φيعني φ=11,3°

نجد w(R)= - 2,94 J

1-[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image001.gif[/IMG][IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image002.gif[/IMG] R

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif[/IMG]يخضع S لقوتين :

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image004.gif[/IMG] - وزنه P

P

[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image005.gif[/IMG] - تأثير السطح الأفقي R

-2 [IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image007.gif[/IMG]w(R)=

φ)/2+[IMG]file:///E:/DOCUME%7E1/ALLALI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image009.gif[/IMG]=R.AB cos( w(R)

نعلم أن K=tang φيعني φ=11,3°

نجد w(R)= - 2,94 J