璇曞嵎绗?/p>
1
椤碉紝鎬?/p>
5
椤?/p>
鐧惧己鏍￠珮鑰冪墿鐞嗕簩杞患鍚堝涔犱笓棰?/p>
9
锛氬姩閲忓畧鎭?/p>
瀛︽牎
:___________
濮撳悕锛?/p>
___________
鐝骇锛?/p>
___________
鑰冨彿锛?/p>
___________
璇勫嵎浜?/p>
寰楀垎
涓�銆佸崟閫夐
1
锛?/p>
A
銆?/p>
B
涓ゅ皬鐞冨湪鍏夋粦姘村钩闈笂娌垮悓涓�鐩寸嚎杩愬姩锛?/p>
B
鐞冨湪鍓嶏紝
A
鐞冨湪鍚庛�?/p>
m
A
=1kg
锛?/p>
m
B
=2kg
銆?/p>
缁忚繃涓�娈垫椂闂达紝
A
銆?/p>
B
鍙戠敓姝ｇ锛岀鎾炴椂闂存瀬鐭紝纰版挒鍓嶃�佸悗涓ょ悆鐨勪綅绉讳竴鏃堕棿鍥惧儚濡?/p>
鍥炬墍绀猴紝鏍规嵁浠ヤ笂淇℃伅鍙煡纰版挒绫诲瀷灞炰簬
A
锛庡脊鎬х鎾?/p>
B
锛庨潪寮规�х鎾?/p>
C
锛庡畬鍏ㄩ潪寮规�х鎾?/p>
D
锛庢潯浠朵笉瓒筹紝鏃犳硶鍒ゆ柇
2
锛?/p>
鈥?/p>
鐖嗙澹颁腑涓�宀侀櫎锛屾槬椋庨�佹殩鍏ュ睜鑻?/p>
鈥?/p>
锛岀垎绔瑰０鍝嶆槸杈炴棫杩庢柊鐨勬爣蹇楋紝鏄枩搴嗗績鎯呯殑
娴侀湶
鏈変竴涓川閲忎负
3
m
鐨勭垎绔逛粠鍦伴潰鏂滃悜涓婃姏鍑猴紝
涓婂崌
h
鍚庡埌杈炬渶楂樼偣锛?/p>
姝ゆ椂閫熷害澶у皬
涓?/p>
銆佹柟鍚戞按骞冲悜涓滐紝鍦ㄦ渶楂樼偣鐖嗙偢鎴愯川閲忎笉绛夌殑涓ゅ潡锛屽叾涓竴鍧楄川閲忎负
2
m
锛岄�熷害澶?/p>
灏忎负
v
锛屾柟鍚戞按骞冲悜涓滐紱閲嶅姏鍔犻�熷害涓?/p>
鍒?/p>
A
锛庣垎绔瑰湪鏈�楂樼偣鐖嗙偢杩囩▼涓紝鏁翠綋鐨勫姩閲忓畧鎭?/p>
B
锛庤川閲忎负
m
鐨勪竴鍧楋紝鍏堕�熷害涓?
C
锛庤川閲忎负
m
鐨勪竴鍧楋紝鍦ㄨ惤鍦拌繃绋嬩腑閲嶅姏鍐查噺鐨勫ぇ灏忎负
锛屾柟鍚戠珫鐩村悜涓?/p>
D
锛庤川閲忎负
2
m
鐨勪竴鍧楋紝鍦ㄨ惤鍦拌繃绋嬩腑閲嶅姏鍐查噺鐨勫ぇ灏忎负
锛屾柟鍚戞按骞冲悜涓?/p>
3
锛庡鍥炬墍绀猴紝璐ㄩ噺
M=3kg
鐨勬粦鍧楀鍦ㄦ按骞冲浐瀹氱潃鐨勮建閬撲笂骞跺彲鍦ㄨ建閬撲笂鏃犳懇鎿︽粦鍔ㄣ�?/p>
璐ㄩ噺
m=2kg
鐨勫皬鐞?/p>
(
瑙嗕负璐ㄧ偣
)
閫氳繃闀?/p>
L=0.5m
鐨勮交鏉嗕笌婊戝潡涓婄殑鍏夋粦杞?/p>
O
杩炴帴锛?/p>
寮�濮嬫椂
婊戝潡闈欐锛?/p>
杞绘潌澶勪簬姘村钩鐘舵�侊紝鐜拌灏忕悆浠庨潤姝㈠紑濮嬮噴鏀撅紝鍙?/p>
g=10m/s
2
锛屼笅鍒楄娉曟