3.4
閫氱數瀵肩嚎鍦ㄧ鍦轰腑鍙楀埌鐨勫姏
鍚屾缁冧範
鈽?/p>
1.
濡傚浘鎵�绀虹殑鍥涗釜鍥句腑锛屽垎鍒爣鏄庝簡閫氱數瀵肩嚎鍦ㄧ鍦轰腑鐨勭數娴佹柟
鍚戙�佺鍦烘柟鍚戜互鍙婇�氱數瀵肩嚎鎵�鍙楃鍦哄姏鐨勬柟鍚戯紝鍏朵腑姝ｇ‘鐨勬槸
(
).
鈽?/p>
2.
濡傚浘鎵�绀猴紝閫氱數瀵肩嚎
MN
鍦ㄧ焊闈㈠唴浠?/p>
a
浣嶇疆缁曞叾涓�绔?/p>
M
杞嚦
b
浣?/p>
缃椂锛岄�氱數瀵肩嚎鎵�鍙楀畨鍩瑰姏鐨勫ぇ灏忓彉鍖栨儏鍐垫槸
( ).
(A)
鍙樺皬
(B)
涓嶅彉
(C)
鍙樺ぇ
(D)
涓嶈兘纭畾
鈽?/p>
3.
灏嗛暱搴︿负
20cm
銆侀�氭湁
O.1A
鐢垫祦鐨勭洿瀵肩嚎鏀惧叆涓�鍖�寮虹鍦轰腑锛岀數
娴佷笌纾佸満鐨勬柟鍚戝鍥炬墍绀?/p>
.
宸茬煡纾佹劅搴斿己搴︿负
1T
锛岃瘯姹備笅鍒楀悇鍥句腑瀵?/p>
绾挎墍鍙楀畨鍩瑰姏鐨勫ぇ灏忓苟鍦ㄥ浘涓爣鏄庢柟鍚?/p>
.
(1)F
A
=________N.(2)F
B
=________N.(3)F
C
=________N.(4)F
D
=_______
_N.
鈽呪槄
4.
璧ら亾涓婃煇澶勬湁涓�绔栫洿鐨勯伩闆烽拡锛?/p>
褰撳甫鏈夋鐢电殑涔屼簯缁忚繃閬块浄閽?/p>
鐨勪笂鏂规椂锛岄伩闆烽拡寮�濮嬫斁鐢碉紝鍒欏湴纾佸満瀵归伩闆烽拡鐨勪綔鐢ㄥ姏鐨勬柟鍚戜负
(
).
(A)
姝ｄ笢
(B)
姝ｅ崡
(C)
姝ｈタ
(D)
姝ｅ寳
鈽呪槄
5.
濡傚浘鎵�绀猴紝
鏀惧湪椹箘褰㈢閾佷袱鏋佷箣闂寸殑瀵间綋妫?/p>
ab
锛?/p>
褰撻�?