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Physique 1Bac Ex 03_02 Travail et En cin - pc-lycee
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Physique 1Bac Ex 03_02 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. 02. ﺗﺴﻘﻂ ﻛﺮة ﻛﺘﻠﺘﻬﺎ m=20,0 g.
اﻟﺸـﻐـﻞ و اﻟـﻄـﺎﻗـﺔ اﻟـﺤـﺮﻛـﻴـﺔ
ﻓﻴﺰﻳﺎء ﺗﻤﺎرﻳﻦ 03
اﻷوﻟﻰ ﺑﻜﺎﻟﻮرﻳﺎ
اﻟـﺘـﻤـﺮﻳـﻦ 02
ﺗﺴﻘﻂ ﻛﺮة ﻛﺘﻠﺘﻬﺎ m=20,0 gﺳﻘﻮﻃﺎ ﺣﺮا ﺑﺪون ﺳﺮﻋﺔ ﺑﺪﺋﻴﺔ ،ﻣﻦ ﻧﻘﻄﺔ ﻋﻠﻰ اﻟﻌﻠﻮ h=16,0 mﻣﻦ ﺳﻄﺢ اﻷرض. -1ﻣﺜﻞ ﻋﻠﻰ ﺷﻜﻞ اﻟﻘﻮى اﻟﻤﻄﺒﻘﺔ ﻋﻠﻰ اﻟﻜﺮة. -2أﺣﺴﺐ ﺷﻐﻞ وزن اﻟﻜﺮة أﺛﻨﺎء اﻟﺴﻘﻮط. -3أﺣﺴﺐ اﻟﻄﺎﻗﺔ اﻟﺤﺮﻛﻴﺔ ﻟﻠﻜﺮة ﻋﻨﺪ وﺻﻮﻟﻬﺎ إﻟﻰ ﺳﻄﺢ اﻷرض ،و اﺳﺘﻨﺘﺞ ﻗﻴﻤﺔ ﺳﺮﻋﺘﻬﺎ ﻓﻲ ﻫﺬه اﻟﻮﺿﻌﻴﺔ. -4ﻣﺎذا ﺳﺘﻜﻮن ﻗﻴﻤﺔ ﻫﺬه اﻟﺴﺮﻋﺔ ﻟﻮ اﺳﺘﺒﺪﻟﻨﺎ اﻟﻜﺮة اﻟﺴﺎﺑﻘﺔ ﺑﺄﺧﺮى ﻛﺘﻠﺘﻬﺎ m’=2m؟ اﺳﺘﻨﺘﺞ . ﻧﺄﺧﺬ . g=9,8N.kg-1
ذ.ﻣـﺤـﻤـﺪ ﺻـﺒـﺤـﻲ
ﺛﺎ.ﻃﺎرق
ﺧـﻨـﻴـﻔـﺮة
www.pc-lycee.com
اﻟﺼﻔﺤﺔ 1\1
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