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Physique 1Bac Ex 03_06 Travail et En cin - pc-lycee
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Physique 1Bac Ex 03_06 Travail et En cin - pc-lycee
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....ذ. ﻣـﺤـﻤـﺪ ﺻـﺒـﺤـﻲ .ﺛﺎ. ﺧ. ﻃﺎرق. ـﻨـ. ﻔـﻴ. ـ. ﺮة lycee.com. - www.pc. اﻟﺼﻔﺤﺔ. \1. 1. ﻓﻴﺰﻳﺎء. ﺗﻤﺎرﻳﻦ. 03. اﻟﺸـﻐـﻞ و اﻟـﻄـﺎﻗـﺔ اﻟـﺤـﺮﻛـﻴـﺔ. اﻷوﻟﻰ ﺑﻜﺎﻟﻮرﻳﺎ. اﻟـﺘـﻤـﺮﻳـﻦ. 06. ﻧﻌﺘﺒﺮ ﺳﻴﺎرة ﻛﺘﻠﺘﻬﺎ m=900,0 kg.
اﻟﺸـﻐـﻞ و اﻟـﻄـﺎﻗـﺔ اﻟـﺤـﺮﻛـﻴـﺔ
ﻓﻴﺰﻳﺎء ﺗﻤﺎرﻳﻦ 03
اﻷوﻟﻰ ﺑﻜﺎﻟﻮرﻳﺎ
اﻟـﺘـﻤـﺮﻳـﻦ 06
ﻧﻌﺘﺒﺮ ﺳﻴﺎرة ﻛﺘﻠﺘﻬﺎ m=900,0 kgﺗﺴﻴﺮ ﺑﺎﻟﺴﺮﻋﺔ . v=100,0 km.h-1ﻳﺸﻐﻞ اﻟﺴﺎﺋﻖ اﻟﻤﻜﺎﺑﺢ ﻓﺘﺘﻮﻗﻒ اﻟﻌﺠﻼت ﻋﻦ اﻟﺪوران،وﺗﻨﺰﻟﻖ اﻟﺴﻴﺎرة ﻋﻠﻰ اﺗﺠﺎه ﻧﻔﺲ اﻟﻤﺤﻮر ﻟﻤﺴﺎﻓﺔ d=86,0 mﺧﻼل اﻟﻤﺪة ∆t=5,60 sﻗﺒﻞ أن ﺗﺘﻮﻗﻒ ﻧﻬﺎﺋﻴﺎ. -1أﺣﺴﺐ اﻟﻄﺎﻗﺔ اﻟﺤﺮﻛﻴﺔ ﻟﻠﺴﻴﺎرة ﻗﺒﻞ ﺗﺸﻐﻴﻞ اﻟﻔﺮاﻣﻞ.ﻓﻲ أي ﻣﻌﻠﻢ ﻳﺘﻢ ﻫﺬا اﻟﺤﺴﺎب؟ -2أﺟﺮد اﻟﻘﻮى اﻟﻤﻄﺒﻘﺔ ﻋﻠﻰ اﻟﺴﻴﺎرة أﺛﻨﺎء ﻋﻤﻠﻴﺔ اﻟﻜﺒﺢ.ﻧﻌﺘﺒﺮ ﻗﻮة اﻻﺣﺘﻜﺎك fﺷﺪﺗﻬﺎ ﺛﺎﺑﺘﺔ ،ﻟﻬﺎ ﻧﻔﺲ اﺗﺠﺎه اﻟﺤﺮﻛﺔ و ﻣﻌﺎﻛﺴﺔ ﻟﻬﺎ.أﺣﺴﺐ ﻗﻴﻤﺔ ﻣﻨﻈﻤﻬﺎ . f -3أﺣﺴﺐ اﻟﻘﺪرة اﻟﻤﺘﻮﺳﻂ ﻟﻠﻘﻮة fأﺛﻨﺎء ﻋﻤﻠﻴﺔ اﻟﻜﺒﺢ. ﻧﺄﺧﺬ . g=9,8N.kg-1
ذ.ﻣـﺤـﻤـﺪ ﺻـﺒـﺤـﻲ
ﺛﺎ.ﻃﺎرق
ﺧـﻨـﻴـﻔـﺮة
www.pc-lycee.com
اﻟﺼﻔﺤﺔ 1\1
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