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1
.
鍏夊瓙鐏浠庡湴鐞冭捣绋嬫椂鍒濆闈欐璐ㄩ噺锛堝寘鎷噧鏂欙級涓?/p>
M
0
锛屽悜鐩歌窛涓?/p>
R=1.8
脳
10
6
1.y.
锛堝厜骞达級
鐨勮繙鏂逛粰濂冲骇鏄熼琛屻�傝姹傜伀绠湪
25
骞达紙鐏鏃堕棿锛夊悗鍒拌揪鐩殑鍦般�傚紩鍔涘奖鍝嶄笉璁°�?/p>
1
锛?/p>
銆?/p>
蹇界暐鐏鍔犻�熷拰鍑忛�熸墍闇�鏃堕棿锛?/p>
璇曢棶鐏鐨勯�熷害搴斾负澶氬ぇ锛?/p>
2
锛?/p>
銆?/p>
璁惧埌杈剧洰鐨勫湴鏃剁伀绠潤姝?/p>
璐ㄩ噺涓?/p>
M
0
藠锛岃瘯闂?/p>
M
0
/M
0
藠鐨勬渶灏忓�兼槸澶氬皯锛?/p>
2
.
濡傚浘鎵�绀猴紝鍦伴潰涓婄殑瑙傚療鑰呰涓哄湪鍦伴潰涓婂悓鏃跺彂鐢熺殑涓や釜浜嬩欢
A
鍜?/p>
B
锛屽湪鐩稿鍦伴潰浠ラ�熷害
u
飦?/p>
锛?/p>
u
飦?
骞宠浜?/p>
x
杞达紝涓斾笌姝ｆ柟鍚戝悓鍚戯級杩愬姩鐨?
鐏涓婄殑瑙傚療鑰呯殑鍒ゆ柇姝ｇ‘鐨勬槸锛堬級
A
銆?/p>
A
鏃╀簬
BB
銆?/p>
B
鏃╀簬
A
C
銆?/p>
A
銆?/p>
B
鍚屾椂鍙戠敓
D
銆佹棤娉曞垽鏂?/p>
3.
濡傚浘鎵�绀猴紝姝ｆ柟褰㈠潎璐ㄦ澘閲?/p>
G
锛岀敤
4
鏍硅交璐ㄦ潌閾伴摼姘村钩鎮寕锛屽褰㈡瀯鎴愯竟
闀夸负
a
鐨勭珛鏂逛綋锛?/p>
鐜板皢鏂规澘缁曢搮鍨傚绉拌酱鏃嬭浆胃瑙掑害锛?/p>
鍐嶇敤涓�缁嗙怀鍥寸粫鍥涙潌鐨勪腑
鐐规崋浣忥紝浣挎澘骞宠 浜幬歌浣嶇疆銆傝瘯姹傜怀鍐呯殑寮犲姏銆?/p>
4
.
濡傚浘鎵�绀猴紝涓�灏忚溅瀵瑰湴浠ュ姞閫熷害
a
1
=1m/s
2
鍚戝乏鐢?
闈欐寮�濮嬩綔鍖�鍔犻�熻繍鍔紝杞︿笂涓�浜哄張浠ュ姞閫熷害
a
2
=2m/s
2
鐩稿浜庤溅鍚戝彸鍚屾椂鐢遍潤姝㈠紑濮嬩綔鍖�鍔犻�熻繍鍔ㄣ�傛眰锛?/p>
锛?/p>
1
锛?
浜哄鍦扮殑鍔犻�熷害锛?/p>
锛?/p>
2
锛夌粡鍘嗘椂闂?/p>
t
1
=1s
锛屼汉瀵瑰湴鐨勭灛鏃堕�熷害锛?/p>
锛?/p>
3
锛夌粡鍘嗘椂闂?/p>
t
2
=2s
锛屼汉瀵瑰湴鐨勪綅绉汇�?/p>
5
锛?/p>
鏈変竴灏忕洿寰勪负
d
鐨勮瘯绠★紝
绠″唴瑁呮湁鐞嗘兂姘斾綋锛?/p>
鍏朵腑鏈変竴娈佃川閲?/p>
m=2g
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L
1
锛堝浘
24-30
锛?/p>
a
锛変腑鐨勶紙
a
锛?/p>
锛?/p>
锛屽綋灏嗙鍙ｅ悜涓嬫椂锛?/p>
姘斾綋鍦ㄨ瘯绠′腑闀夸负
L
2
锛堝浘
24-30
锛?/p>
b
锛変腑鐨勶紙
b
锛?/p>
锛?/p>
锛岃瘯姹?/p>
L
2
/L
1
涓哄灏戯紵
6
锛庢湁涓�涓袱绔紑鍙ｃ�佺矖缁嗗潎鍖�鐨?/p>
U
鍨嬬幓鐠冪粏绠★紝鏀剧疆鍦ㄧ珫鐩村钩
闈?/p>
鍐?/p>
锛?/p>
澶?/p>
鍦ㄥ帇寮轰负
0
p
鐨勫ぇ姘斾腑锛屼袱涓珫鐩存敮绠＄殑楂樺害鍧囦负
h
锛屾按骞崇鐨勯暱搴?/p>
涓?/p>
2h
锛岀幓
鐠冪粏绠＄殑鍗婂緞涓?/p>
r,r?h
锛屼粖灏嗘按骞崇鍐呯亴婊″瘑搴︿负
蟻
鐨勬按閾讹紝濡傚浘
鎵�绀恒�?/p>
x
y
z
O
u
A
B
G
1
a
2
a
h
h
2