銆婃櫘閫氱墿鐞?/p>
A(
涓?/p>
)
銆嬭瘯鍗?/p>
绗?/p>
1
椤?/p>
鍏?/p>
9
椤?/p>
銆?/p>
鏅�氱墿鐞?/p>
A
(
涓?/p>
)
銆嬭�冭瘯璇曞嵎锛?/p>
B
鍗凤級
锛堥棴鍗?/p>
鏃堕棿
120
鍒嗛挓
锛?/p>
涓�銆侀�夋嫨棰橈紙姣忓皬棰?/p>
3
鍒嗭紝鍏?/p>
30
鍒嗭級
1
锛庢煇璐ㄧ偣浣滅洿绾胯繍鍔ㄧ殑杩愬姩瀛︽柟绋嬩负
x
锛?/p>
3
t
-
5
t
3
+ 6 (SI)
锛屽垯璇ヨ川鐐逛綔
[ ]
(A)
鍖�鍔犻�熺洿绾胯繍鍔紝鍔犻�熷害娌?/p>
x
杞存鏂瑰悜锛?/p>
(B)
鍖�鍔犻�熺洿绾胯繍鍔紝鍔犻�熷害娌?/p>
x
杞磋礋鏂瑰悜锛?/p>
(C)
鍙樺姞閫熺洿绾胯繍鍔紝鍔犻�熷害娌?/p>
x
杞存鏂瑰悜锛?/p>
(D)
鍙樺姞閫熺洿绾胯繍鍔紝鍔犻�熷害娌?/p>
x
杞磋礋鏂瑰悜锛?/p>
2
锛?/p>
涓�鍏夋粦鐨勫唴琛ㄩ潰鍗婂緞涓?/p>
10cm
鐨勫崐鐞冨舰纰楋紝浠ュ寑瑙掗�熷害
飦?/p>
缁曞叾瀵圭О
OC
鏃嬭浆锛庡凡鐭ユ斁鍦ㄧ鍐呰〃闈笂鐨勪竴涓皬鐞?/p>
P
鐩稿浜庣闈欐锛屽叾浣嶇疆
楂樹簬纰楀簳
4 cm
锛屽垯鐢辨鍙帹鐭ョ鏃嬭浆鐨勮閫熷害绾︿负
(A) 10 rad/s
锛?/p>
(B) 13 rad/s
锛?/p>
(C) 17 rad/s
(D) 18 rad/s
锛?/p>
[ ]
3
锛庝汉閫犲湴鐞冨崼鏄燂紝缁曞湴鐞冧綔妞渾杞ㄩ亾杩愬姩锛屽湴鐞冨湪妞渾鐨勪竴涓劍鐐逛笂锛屽垯鍗槦鐨?/p>
(A)
鍔ㄩ噺涓嶅畧鎭掞紝鍔ㄨ兘瀹堟亽锛?/p>
(B)
鍔ㄩ噺瀹堟亽锛屽姩鑳戒笉瀹堟亽锛?/p>
(C)
瀵瑰湴蹇冪殑瑙掑姩閲忓畧鎭掞紝鍔ㄨ兘涓嶅畧鎭掞紟
(D)
瀵瑰湴蹇冪殑瑙掑姩閲忎笉瀹堟亽锛?/p>
鍔ㄨ兘瀹堟亽锛?/p>
[ ]
4
锛庤川閲忎负
m
锛?/p>
0.5
kg
鐨勮川鐐癸紝鍦?/p>
Oxy
鍧愭爣骞抽潰鍐呰繍鍔紝鍏惰繍鍔ㄦ柟绋嬩负
x
锛?/p>
5
t
锛?/p>
y
=0.5
t
2
(SI)
锛屼粠
t
=2
s
鍒?/p>
t
=4
s
杩欐鏃堕棿鍐咃紝澶栧姏瀵硅川鐐逛綔鐨勫姛涓?/p>
(A)
1.5
J
锛?/p>
(B)
3
J
锛?/p>
(C)
4.5
J
锛?/p>
(D)
-1.5
J
锛?/p>
[ ]
5
锛庝竴浜洪�犲湴鐞冨崼鏄熷埌鍦扮悆涓績
O
鐨勬渶澶ц窛绂诲拰鏈�灏忚窛绂诲垎鍒槸
R
A
鍜?/p>
R
B
锛庤鍗槦瀵瑰簲鐨勮鍔ㄩ噺鍒嗗埆鏄?/p>
L
A
銆?/p>
L
B
锛屽姩鑳藉垎鍒槸
E
KA
銆?/p>
E
KB
锛屽垯搴旀湁
[ ]
(A)
L
B
>
L
A
锛?/p>
E
KA
>
E
KB
锛?/p>
(B)
L
B
>
L
A
锛?/p>
E
KA
=
E
KB
锛?/p>
棰?/p>
鍙?/p>
涓�
浜?/p>
涓?/p>
(20)
涓?/p>
(21)
涓?/p>
(22)
涓?/p>
(23)
涓?/p>
(24)
涓?/p>
(25)
鎬诲垎
寰?/p>
鍒?/p>
闃呭嵎浜?/p>
寰?/p>
鍒?/p>
蠅
P
C
O
A
B
R
A
R
B
O