鎶�鏈墿鐞嗘湡鏈涔犻
1
銆?/p>
鐗╀綋鍦?/p>
t
鏃跺埢鐨勪綅鐭负
r
=
t
2
i
+ 2
t
j
锛?/p>
鍒欑墿浣撳湪鍓?/p>
3s
鍐呯殑浣嶇Щ澶у皬涓?/p>
_________
锛?/p>
鍦ㄧ
3s
鍐?/p>
鐨勪綅绉诲ぇ灏忎负
__________
锛?/p>
鍦ㄧ
3s
鏈�熷害澶у皬涓?/p>
__________
锛?/p>
鍔犻�熷害鐨勫ぇ灏忎负
__________
銆?/p>
锛堝凡鐭ヤ綅鐭㈢殑鍗曚綅涓?/p>
m
锛屾椂闂寸殑鍗曚綅涓?/p>
s
锛?/p>
2
銆佹煇璐ㄧ偣浣滅洿绾胯繍鍔紝鍏朵綅绉诲ぇ灏忎笌鏃堕棿鐨勫叧绯讳负
x = t
2
+ 3
t
锛屽垯鍦?/p>
t
=2s
鏃剁殑閫熷害鍜屽姞閫?/p>
搴︾殑澶у皬鍒嗗埆涓猴細
A
銆?/p>
5 m/s
锛?/p>
2.5 m/s
2
B
銆?/p>
7 m/s
锛?/p>
2 m/s
2
C
銆?/p>
5 m/s
锛?/p>
2 m/s
2
D
銆?/p>
7 m/s
锛?/p>
2.5 m/s
2
3
銆佷竴璐ㄩ噺涓?/p>
60kg
鐨勪汉绔欏湪鐢垫涓殑纾呯Г涓婏紝褰撶數姊互
2m/s
2
鐨勫姞閫熷害鍖�鍔犻�熶笂鍗囨椂锛岀绉?/p>
鐨勭ず鏁颁负锛?/p>
A
銆?/p>
708N
B
銆?/p>
588N
C
銆?/p>
468N
D
銆?/p>
120N
4
銆佷竴浜虹珯鍦ㄧ绉や笂锛屽湪浠栦笅韫茬殑杩囩▼涓紝纾呯Г鐨勭ず鏁板浣曞彉鍖栵紵
A
銆佸彉灏?/p>
B
銆佸彉澶?/p>
C
銆佸厛鍙樺皬锛屽悗鍙樺ぇ
D
銆佸厛鍙樺ぇ锛屽悗鍙樺皬
5
銆佷竴璐ㄩ噺涓?/p>
50kg
鐨勪汉绔欏湪鐢垫涓殑纾呯Г涓婏紝褰撶數姊互
2m/s
2
鐨勫姞閫熷害鍖�鍔犻�熶笂鍗囨椂锛岀绉?/p>
鐨勭ず鏁颁负
_________
銆?/p>
锛堝彇
g=10m/s
2
锛?/p>
6
銆佷竴璐ㄩ噺涓?/p>
60kg
鐨勪汉绔欏湪鐢垫涓殑纾呯Г涓婏紝褰撶數姊互
2m/s
2
鐨勫姞閫熷害鍖�鍔犻�熶笂鍗囨椂锛岀绉?/p>
鐨勭ず鏁颁负
銆傚綋鐢垫浠?/p>
2m/s
2
鐨勫姞閫熷害鍖�鍑忛�熶笅闄嶆椂锛岀绉ょ殑绀烘暟涓?/p>
_________
銆?/p>
锛堝彇
g
=10m/s
2
锛?/p>
7
銆佷竴椋炶疆鍗婂緞涓?/p>
0.2m
锛岃浆閫熶负
1200
杞?/p>
/
鍒嗭紙
r/min
锛?/p>
锛屽洜鍙楀埗鍔ㄨ�屽潎鍖�鍑忛�燂紝缁?/p>
30s
鍋滄杞?/p>
鍔紝璇曟眰锛?/p>
锛?/p>
1
锛夐杞殑瑙掑姞閫熷害锛?/p>
锛?/p>
2
锛?/p>
鍒跺姩寮�濮?/p>
9s
鏃讹紝
椋炶疆鐨勮閫熷害銆?/p>
椋炶疆杈圭紭涓婁竴鐐圭殑绾块�熷害涓庡垏鍚戝姞閫熷害鍜屾硶鍚戝姞閫熷害锛?/p>
锛?/p>
3
锛夐杞湪鍋滄鍓嶈浆杩囩殑鍦堟暟銆?/p>
8
銆佽浆鍔ㄧ殑椋炶疆涓婃湁涓ょ偣
A
鍜?/p>
B
锛?/p>
A
鐐瑰湪椋炶疆杈圭紭涓婏紝
B
鐐瑰湪杞酱涓庤竟缂樹箣闂寸殑涓�鍗婂锛?/p>
v
A
銆?/p>
v
B
鍜?/p>
蠅
A
銆?/p>
蠅
B
鍒嗗埆涓?/p>
A
銆?/p>
B
涓ょ偣鐨勭嚎閫熷害鍜岃閫熷害锛屽垯瀹冧滑涔嬮棿鐨勫叧绯讳负锛?/p>
A
銆?/p>
v
A
=
v
B
锛?/p>
蠅
A
=
蠅
B
B
銆?/p>
v
A
= 2
v
B
锛?/p>
蠅
A
=
蠅
B
C
銆?/p>
v
A
=
v
B
锛?/p>
蠅
A
= 2
蠅
B
D
銆?/p>
v
A
= 2
v
B
锛?/p>
蠅
A
= 2
蠅
B
9
銆佸鍥炬墍绀猴紝鍗婂緞涓?/p>
R
锛岃浆杩愭儻閲忎负
J
鐨勫畾婊戣疆
A
鍙粫姘村钩鍏夋粦杞磋浆鍔紝杞笂缁曟湁杞荤怀锛?/p>
缁崇殑涓�绔郴鏈夎川閲忎负
m
鐨勭墿浣擄紝鐗╀綋鍙湪鍊捐涓?/p>
胃
鐨勫厜婊戞枩闈笂婊戝姩锛屾眰鐗╀綋鐨勫姞閫熷害鍜?/p>
缁充腑鐨勬媺鍔涖�?/p>