娉ㄥ唺绲�(ji茅)妲�(g貌u)宸ョ▼甯│椤岃紨灏�(d菐o)锛氭尝鐨勭浉闂�(gu膩n)绶寸繏(x铆)(7)


鐩搁棞(gu膩n)鎺ㄨ枽锛�娉ㄥ唺绲�(ji茅)妲�(g貌u)宸ョ▼甯│椤岃紨灏�(d菐o)锛氭尝鐨勭浉闂�(gu膩n)绶寸繏(x铆)鍖附
1.宸茬煡涓€骞抽潰璜ф尝娌縳杌告鏂瑰悜鍌虫挱,娉㈤€熺偤c,骞剁煡X=Xo铏曡唱(zh矛)榛�(di菐n)鐨勬尟鍕曟柟绋嬬偤y=Acosωt,鍓囨娉㈢殑琛ㄧず寮忕偤:( )
绛旀锛欳
2.鑱查煶寰炶伈娉㈢櫦(f膩)鍑�,鍦ㄧ┖涓偝鎾亷绋嬩腑(瑷�(sh猫)绌烘埃鍧囧嫽鐨�) ,鍓�: (C)
(A)鑱叉尝娉㈤€熶笉鏂锋笡灏� (B)鑱叉尝闋荤巼涓嶆柗娓涘皬
(C)鑱叉尝鎸箙涓嶆柗娓涘皬 (D)鑱叉尝娉㈤暦涓嶆柗娓涘皬
(E)鑱叉尝鐨勫懆鏈熶笉鏂锋笡灏�
绛旀锛欳
3.濡傚湒2-26鎵€绀哄叐鐩稿共娉㈡簮S1鑸嘢2鐩歌窛3/4λ(λ鐐烘尝闀�) ,瑷�(sh猫)鍏╂尝鍦⊿1銆丼2閫g窔涓婂偝鎾檪(sh铆),瀹冨€戠殑鎸箙閮芥槸A,涓斾笉闅ㄨ窛闆㈣畩鍖�,宸茬煡鍦ㄨ┎鐩寸窔涓婂湪S1宸﹀伌(c猫)鍚勯粸(di菐n)鐨勫悎鎴愭尝鐨勫挤(qi谩ng)搴︾偤鍏朵腑涓€鍊�(g猫)娉㈠挤(qi谩ng)搴︾殑4鍊�,鍓囧叐娉㈡簮鎳�(y墨ng)婊胯冻鐨勪綅鐩告浠舵槸:( )
绛旀锛欳
4.鍏╃浉骞插钩闈㈢啊璜ф尝鎸箙鐨嗙偤4cm,鍏╂尝婧愮浉璺�30cm,浣嶇浉宸偤π,鍦ㄥ叐娉㈡簮閫g窔鐨勪腑鍨傜窔涓婁换鎰忎竴榛�(di菐n)p,鍏╁垪娉㈣凯鍔犲悗鍚堟尟骞呯偤:( )
(A) 8cm; (B) 16cm; (C) 30cm; (D) 0銆�
绛旀锛欴
5.鍦ㄤ竴鏍瑰緢闀风殑寮︾窔涓�(瑕栫偤Z杌�) ,鏈夊叐鍒楁尝鍌虫挱,鍏舵柟绋嬪紡鐐�:
Y1 =6.0X10-2cosπ(x-40t)/2(SI)
Y2=6.0X10-2cosπ(x+40t)/2(SI)
瀹冨€戣凯鍔犲悗褰㈡垚椐愭尝,鍓囨尝绡€(ji茅)鐨勪綅缃槸:( )
(A) x=2km; (B) (2k+ 1) /2m;
(C) x=(2k+l)m; (D) (2k+1)/4m銆�
绛旀锛欳
浠ヤ笂鍏�(n猫i)瀹圭偤锛氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯│椤岃紨灏�(d菐o)锛氭尝鐨勭浉闂�(gu膩n)绶寸繏(x铆)(7)锛屽儏渚涘ぇ瀹跺弮鑰冦€傛煡鐪嬫洿澶氬厤璨�(f猫i)瀛�(xu茅)缈�(x铆)璩囨枡锛岄粸(di菐n)鎿婂厤璨�(f猫i)涓嬭級>>>绲�(ji茅)妲�(g貌u)宸ョ▼甯│椤�/鑰冮粸(di菐n)绮捐彲
鏈€鏂拌硣瑷�
- 娉ㄥ唺绲�(ji茅)妲�(g貌u)宸ョ▼甯ā鎿€冭│椤�2023-04-23
- 涓€绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯ā鎿涓嬭級2023-04-21
- 涓€绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯ā鎿2023-04-20
- 2022骞翠竴绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯│椤�2022-04-11
- 2021骞存敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯€冨墠寰�(f霉)缈�(x铆)绶寸繏(x铆)椤屽尟绺斤紙鍚ā鎿銆佹骞寸湡椤岋級2021-09-28
- 2021骞翠簩绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯皥妤�(y猫)鑰冭│娌栧埡瑭﹂鍙婄瓟妗堬紙鍗侊級2021-09-16
- 2021骞翠簩绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯皥妤�(y猫)鑰冭│娌栧埡瑭﹂鍙婄瓟妗堬紙涔濓級2021-09-15
- 2021骞翠簩绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯皥妤�(y猫)鑰冭│娌栧埡瑭﹂鍙婄瓟妗堬紙鍏級2021-09-14
- 2021骞翠簩绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯皥妤�(y猫)鑰冭│娌栧埡瑭﹂鍙婄瓟妗堬紙涓冿級2021-09-13
- 2021骞翠簩绱氭敞鍐婄祼(ji茅)妲�(g貌u)宸ョ▼甯皥妤�(y猫)鑰冭│娌栧埡瑭﹂鍙婄瓟妗堬紙鍏級2021-09-10