绗?/p>
1
椤碉紙鍏?/p>
51
椤碉級
2019
楂樹笁鐗╃悊澶嶄範澶囪�冦�婃洸绾胯繍鍔ㄣ�嬩笓棰樺涔?/p>
锛堝叏鍥藉悇鍦版ā鎷熻瘯棰樻眹缂栵級
1
锛?/p>
锛?/p>
2018鈥?/p>
鍖栧窞甯備竴妯★級濡傚浘鎵�绀猴紝鍗婂緞
R=0.4m
鐨勫厜婊戝渾寮ц建閬?/p>
BC
鍥哄畾鍦ㄧ珫鐩?/p>
骞抽潰鍐咃紝杞ㄩ亾鐨勪笂绔偣
B
鍜屽渾蹇?/p>
0
鐨勮繛
绾夸笌姘村钩鏂瑰悜鐨勫す瑙?/p>
胃=30掳
锛庝笅绔偣
C
涓鸿建閬撶殑鏈�浣庣偣涓斾笌绮楃硻姘村钩闈㈢浉鍒囷紝
涓�璐ㄩ噺
m=0
锛?/p>
lkg
鐨勫皬
鐗╁潡
锛堝彲瑙嗕负璐ㄧ偣锛?/p>
浠庣┖涓殑
A
鐐逛互
v
0
=2m/s
鐨勯�熷害琚按骞虫媼鍑猴紝
鎭板ソ浠?/p>
B
鐐规部杞ㄩ亾鍒囩嚎鏂瑰悜杩涘叆杞?/p>
閬擄紝缁忚繃
C
鐐瑰悗娌挎按骞抽潰鍚戝彸杩愬姩鑷?/p>
D
鐐规椂鍋滄杩愬姩锛屽凡鐭ュ皬鐗╁潡涓庢按骞抽潰闂?/p>
鐨勫姩鎽╂摝鍥犳暟
渭=0.1
锛?/p>
g
鍙?/p>
10m/s
2
锛庢眰锛?/p>
锛?/p>
1
锛夋眰灏忕墿鍧椾粠
A
鐐硅繍鍔ㄨ嚦
B
鐐圭殑鏃堕棿锛?/p>
锛?/p>
2
锛夋眰灏忕墿鍧楃粡杩囧渾寮ц建閬撲笂鐨?/p>
C
鐐规椂锛屽杞ㄩ亾鐨勫帇鍔涳紟
锛?/p>
3
锛夋眰
C
銆?/p>
D
涓ょ偣闂寸殑姘村钩璺濈
L
锛?/p>
2
锛?/p>
锛?/p>
2018鈥?/p>
鍐呮睙涓�妯★級濡傚浘鎵�绀猴紝璐ㄩ噺
M=0.4kg
鐨勯暱钖勬澘
BC
闈欑疆浜庡�捐涓?/p>
37掳
鐨?/p>
鍏夋粦鏂滈潰涓婏紝鍦ㄨ窛涓婄
B
姘村钩璺濈涓?/p>
1.2m
鐨?/p>
A
澶勶紝鏈変竴涓川閲?/p>
m=0.1kg
鐨勫皬鐗?/p>
浣擄紝浠ヤ竴瀹氱殑鍒濋�熷害姘村钩鎶涘嚭锛屾伆濂戒互骞宠浜庢枩闈㈢殑閫熷害钀藉湪钖勬澘
BC
涓婄殑
B
绔?/p>
鐐癸紝骞跺湪钖勬澘涓婂紑濮嬪悜涓嬭繍鍔紝褰撳皬鐗╀綋钀藉湪钖勬澘
BC
涓婄殑
B
绔椂锛岃杽鏉挎棤鍒濋�?/p>
搴﹂噴鏀惧苟寮�濮嬫部鏂滈潰鍚戜笅杩愬姩锛屽綋灏忕墿鍧楄繍鍔ㄥ埌钖勬澘鐨勬渶涓嬬
C
鐐规椂锛屼笌钖勬澘
BC
鐨勯�熷害鎭板ソ鐩哥瓑锛屽皬鐗╁潡涓庤杽鏉夸箣闂寸殑鍔ㄦ懇鎿﹀洜鏁颁负
0.5
锛?/p>
sin37掳
=0.6
锛?/p>
cos37掳
=0.8
锛?/p>
g=10m/s
2
锛屾眰锛?/p>
锛?/p>
1
锛夊皬鐗╀綋鍦?/p>
A
鐐圭殑鍒濋�熷害锛?/p>
锛?/p>
2
锛夎杽鏉?/p>
BC
鐨勯暱搴︺�?/p>