纰版挒涓庤兘閲忓畧鎭?/p>
璇炬椂瑙勮寖璁粌
[
鍩虹宸╁浐棰樼粍
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1
锛庡鍥炬墍绀猴紝鍦ㄥ厜婊戞按骞抽潰涓婅川閲忓垎鍒负
m
A
锛?/p>
2
kg
銆?/p>
m
B
锛?/p>
4
kg
锛岄�熺巼鍒嗗埆涓?/p>
v
A
锛?/p>
5
m/s
銆?
v
B
锛?/p>
2 m/s
鐨?/p>
A
銆?/p>
B
涓ゅ皬鐞冩部鍚屼竴鐩寸嚎鐩稿悜杩愬姩
(
)
A
锛庡畠浠鎾炲墠鐨勬�诲姩閲忔槸
18 kg路m/s锛屾柟鍚戞按骞冲悜鍙?/p>
B
锛庡畠浠鎾炲悗鐨勬�诲姩閲忔槸
18 kg路m/s锛屾柟鍚戞按骞冲悜宸?/p>
C
锛庡畠浠鎾炲墠鐨勬�诲姩閲忔槸
2 kg路m/s锛屾柟鍚戞按骞冲悜鍙?/p>
D
锛庡畠浠鎾炲悗鐨勬�诲姩閲忔槸
2 kg路m/s锛屾柟鍚戞按骞冲悜宸?/p>
瑙ｆ瀽锛?/p>
閫?/p>
C.
瀹冧滑纰版挒鍓嶇殑鎬诲姩閲忔槸
2 kg路m/s锛屾柟鍚戞按骞冲悜鍙筹紝
A
銆?/p>
B
鐩哥杩囩▼涓姩閲?/p>
瀹堟亽锛屾晠瀹冧滑纰版挒鍚庣殑鎬诲姩閲忎篃鏄?/p>
2 kg路m/s锛屾柟鍚戞按骞冲悜鍙筹紝閫夐」
C
姝ｇ‘锛?/p>
2.
涓�鏋氱伀绠惌杞界潃鍗槦浠ラ�熺巼
v
0
杩涘叆澶┖棰勫畾浣嶇疆锛?/p>
鐢辨帶鍒剁郴缁熶娇绠綋涓庡崼鏄熷垎绂伙紟
宸?/p>
鐭ュ墠閮ㄥ垎鐨勫崼鏄熻川閲忎负
m
1
锛屽悗閮ㄥ垎鐨勭浣撹川閲忎负
m
2
锛屽垎绂诲悗绠綋浠ラ�熺巼
v
2
娌跨伀绠師鏂瑰悜椋?/p>
琛岋紝鑻ュ拷鐣ョ┖姘旈樆鍔涘強鍒嗙鍓嶅悗绯荤粺璐ㄩ噺鐨勫彉鍖栵紝鍒欏垎绂诲悗鍗槦鐨勯�熺巼
v
1
涓?/p>
(
)
A
锛?/p>
v
0
锛?/p>
v
2
B
锛?/p>
v
0
锛?/p>
v
2
C
锛?/p>
v
0
锛?/p>
m
2
m
1
v
2
D
锛?/p>
v
0
锛?/p>
m
2
m
1
(
v
0
锛?/p>
v
2
)
瑙ｆ瀽锛?/p>
閫?/p>
D.
鐢卞姩閲忓畧鎭掑畾寰嬪緱
(
m
1
锛?/p>
m
2
)
v
0
锛?/p>
m
1
v
1
锛?/p>
m
2
v
2
寰?/p>
v
1
锛?/p>
v
0
锛?/p>
m
2
m
1
(
v
0
锛?/p>
v
2
)
锛?/p>
3
锛?/p>
鐢层�?/p>
涔欎袱鐞冨湪姘村钩鍏夋粦杞ㄩ亾涓婂悜鍚屾柟鍚戣繍鍔紝
宸茬煡瀹冧滑鐨勫姩閲忓垎鍒槸
p
1
锛?
kg路m/s锛?
p
2
锛? kg路m/s锛岀敳浠庡悗闈㈣拷涓婁箼骞跺彂鐢熺鎾烇紝纰板悗涔欑悆鐨勫姩閲忓彉涓?/p>
10 kg路m/s锛屽垯浜岀悆璐?
閲?/p>
m
1
涓?/p>
m
2
闂寸殑鍏崇郴鍙兘鏄笅闈㈢殑鍝嚑绉?/p>
(
)
A
锛?/p>
m
1
锛?/p>
m
2
B
锛?/p>
2
m
1
锛?/p>
m
2
C
锛?/p>
4
m
1
锛?/p>
m
2
D
锛?/p>
6
m
1
锛?/p>
m
2
瑙ｆ瀽锛?/p>
閫?/p>
C.
鐢层�佷箼涓ょ悆鍦ㄧ鎾炶繃绋嬩腑鍔ㄩ噺瀹堟亽锛屾墍浠ユ湁锛?/p>
p
1
锛?/p>
p
2
锛?/p>
p
1
鈥诧紜
p
2
鈥诧紝鍗筹細
p
1
鈥?/p>
锛?
kg路m/s.鐢变簬鍦ㄧ鎾炶繃绋嬩腑锛屼笉鍙兘鏈夊叾瀹冨舰寮忕殑鑳介噺杞寲涓烘満姊拌兘锛屽彧鑳芥槸绯荤粺鍐呯墿
浣撻棿鏈烘鑳界浉浜掕浆鍖栨垨涓�閮ㄥ垎鏈烘鑳借浆鍖栦负鍐呰兘锛?/p>
鍥犳绯荤粺鐨勬満姊拌兘涓嶄細澧炲姞锛?/p>
鎵�浠ユ湁
p
2
1
2
m
1
锛?
p
2
2
2
m
2
鈮?/p>
p
1
鈥?/p>
2
2
m
1
锛?/p>
p
2
鈥?/p>
2
2
m
2
锛屾墍浠ユ湁锛?/p>
m
1
鈮?/p>
21
51
m
2
锛屽洜涓洪鐩粰鍑虹墿鐞嗘儏鏅槸鈥滅敳浠庡悗闈㈣拷涓婁箼鈥濓紝瑕佺