1.4专题四平抛运动规律的应用(二)课件+-2022-2023学年高一下学期物理教科版（2019）必修第二册(共27张PPT)

(课件网) 厚德求正 博学求真 1.专题四-平抛运动规律的应用(二) “从物理学出发思考一切” ——— 爱因斯坦 Honghu Senior High School 平抛运动的临界问题 01 类平抛运动 02 目 录 CONTENTS 厚德求正 丨 博学求真 Honghu Senior High School e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D 平抛运动的临界问题 PART ONE 1 e7d195523061f1c0006c30382f9a94fcf40f581039171ee7152C150C6C764778087C18C5583B9AEF1266D03E34B2F635197C86C67CE775F9591DBF5647AA59104A0B201FCDA87935B22C0FABB54C018C98031B70871257772CB4502CFD6E1CB41348B3771EFE2400DCB884C85E0469312866D82F00B9E8CF80D69D27AFAC8B47E11013348EFEADDE e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D h v1 v2 小球从某一高度抛出，速度大小在什么取值范围才能扔进垃圾桶？ 平抛运动的临界问题1 点击观看视频 画一画：小球分别落在哪两个位置对应能进桶的最小速度与最大速度？ e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D 平抛运动的临界问题1 已知h=0.8m，抛出点距离垃圾桶正中心的水平距离L=0.6m，垃圾桶半径R=0.2m，不计空气阻力，g取10 m/s2 ，求： (1)小球落入垃圾桶所用的时间t； (2)小球要落入垃圾桶里，初速度大小的取值范围. h=0.8m v0 L=0.6m R=0.2m e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF2569D4B6C1DA7F1A4683A481403BD872FC687266AD13265C1DE7C373772FD8728ABDD69ADD03BFF5BE2862BC891DBB79E950753400A011C7C3B99A25F820103BC51EA757209CB54CD5BE620EDB56A7486908F9B9260006C3940C1CCC47E83D4F0E18A2025A59CCA2D 平抛运动的临界问题1 (2)设小球能落入垃圾桶的最小速度为v1，最大速度为v2 L-R= v1 t L+R=v2 t 解得 v1 =(L-R) v2 =(L+R) 代入数据得v1 =1m/s v2 =2m/s (1)竖直方向上： h=gt2 解得 t= 代入数据得t=0.4s h=0.8m L=0.6m R=0.2m v1 v2 e7d195523061f1c09e9d68d7cf438b91ef959ecb14fc25d26BBA7F7DBC18E55DFF4014AF651F0BF256 ... ...