1.
涓�璐ㄧ偣浣滅洿绾胯繍鍔紝鏌愭椂鍒荤殑鐬椂閫熷害
2
/
v
m
s
飥?/p>
锛岀灛鏃跺姞閫熷害
2
2
/
a
m
s
飥?/p>
飥?/p>
锛屽垯
1
绉掑悗
璐ㄧ偣鐨勯�熷害
( D )
(A)
绛変簬闆?/p>
(B)
绛変簬
2
/
m
s
飥?/p>
(C)
绛変簬
2
/
m
s
(D)
涓嶈兘纭畾
2.
涓�璐ㄧ偣娌垮崐寰勪负
R
鐨勫渾鍛ㄥ仛鍖�閫熺巼杩愬姩锛屾瘡
t
鏃堕棿杞竴鍦堬紝鍦?/p>
2t
鏃堕棿闂撮殧涓紝鍏跺钩鍧囬�?/p>
搴﹀ぇ灏忓拰骞冲潎閫熺巼澶у皬鍒嗗埆涓?/p>
( B )
(A)
2
R
t
飦?/p>
锛?/p>
2
R
t
飦?/p>
(B)O,
2
R
t
飦?/p>
(C)0
锛?/p>
0 (D)
2
R
t
飦?/p>
,0
3.
濡傚浘鎵�绀猴紝婀栦腑鏈変竴灏忚埞锛屾湁浜虹敤缁崇粫杩囧哺涓婁竴瀹氶珮搴﹀鐨勫畾婊戣疆
鎷夋箹涓殑鑸瑰悜宀歌竟杩愬姩銆傝璇ヤ汉浠ュ寑閫熺巼
0
v
鏀剁怀锛岀怀涓嶄几闀夸笖婀栨按闈?/p>
姝紝灏忚埞鐨勯�熺巼涓?/p>
v
锛屽垯灏忚埞浣?/p>
(
c
)
(A)
鍖�鍔犻�熻繍鍔紝
0
cos
v
v
飦?/p>
飥?/p>
(B)
鍖�鍑忛�熻繍鍔紝
0
cos
v
v
飦?/p>
飥?/p>
(C)
鍙樺姞閫熻繍鍔紝
0
cos
v
v
飦?
飥?/p>
(D)
鍙樺噺閫熻繍鍔紝
0
cos
v
v
飦?/p>
飥?/p>
(E)
鍖�閫熺洿绾胯繍鍔紝
0
v
v
飥?/p>
4.
浠ヤ笅浜旂杩愬姩褰㈠紡涓紝
a
飦?
淇濇寔涓嶅彉鐨勮繍鍔ㄦ槸
(
D
)
(A)
鍗曟憜鐨勮繍鍔紟
(B)
鍖�閫熺巼鍦嗗懆杩愬姩锛?/p>
(C)
琛屾槦鐨勬き鍦嗚建閬撹繍鍔紟
(D)
鎶涗綋杩愬姩锛?/p>
(E)
鍦嗛敟鎽嗚繍鍔紟
5.
璐ㄧ偣娌胯建閬?/p>
AB
浣滄洸绾胯繍鍔紝閫熺巼閫愭笎鍑忓皬锛屽浘涓摢涓�绉嶆儏鍐垫纭湴琛ㄧず浜嗚川鐐瑰湪
C
澶?/p>
鐨勫姞閫熷害
? (
C )
(A)
(B)
(C)
(D
1.
涓�鐗╀綋浣滃鍥炬墍绀虹殑鏂滄姏杩愬姩锛?/p>
娴嬪緱鍦ㄨ建閬?/p>
锛?/p>
鐐瑰閫熷害澶у皬涓?/p>
v
锛?/p>
鍏舵柟鍚戜笌姘村钩
鏂瑰悜鎴?/p>
30掳
瑙掋�傚垯鐗╀綋鍦?/p>
锛?/p>
鐐圭殑鍒囧悜鍔犻�熷害
a
蟿
=
-0.5g
锛岃建閬撶殑鏇茬巼鍗婂緞
飦?/p>
=
2v
虏/鈭?g
銆?/p>
2.
杞埞鍦ㄦ按涓婁互鐩稿浜庢按鐨勯�熷害
1
V
鑸锛屾按娴侀�熷害涓?/p>
2
V
锛屼竴浜虹浉瀵逛簬鐢叉澘浠ラ�?/p>
搴?/p>
3
V
琛岃蛋锛屽浜虹浉瀵逛簬宀搁潤姝紝鍒?/p>
1
V
銆?/p>
2
V
鍜?/p>
3
V
鐨勫叧绯绘槸锛?/p>
v1+v2+v3=0
锛匡伎锛匡伎銆?/p>
3.
鍔犻�熷害鐭㈤噺鍙垎瑙ｄ负娉曞悜鍔犻�熷害鍜屽垏鍚戝姞閫熷害涓や釜鍒嗛噺锛?/p>
瀵瑰寑閫熷渾鍛ㄨ繍鍔紝
锛垮垏锛垮悜鍔犻�?/p>
搴︿负闆讹紝鎬荤殑鍔犻�熷害绛変簬锛挎硶鍚戝姞閫熷害銆?/p>
a
飦?/p>
C
A
B
a
飦?/p>
C
A
B
a
飦?/p>
C
A
B
a
飦?/p>
C
A
B