涓撻
15
鏈烘鎸姩鍜屾満姊版尝
1
锛庡鍥炬墍绀猴紝涓�鍒楃畝璋愭í娉㈠悜鍙充紶鎾紝
P
銆?/p>
Q
涓よ川鐐瑰钩琛′綅缃浉璺?/p>
0.15 m
銆傚綋
P
杩愬姩鍒颁笂鏂规渶澶т綅绉诲鏃讹紝
Q
鍒氬ソ杩愬姩鍒颁笅鏂规渶澶т綅绉诲锛屽垯杩欏垪娉㈢殑娉㈤暱鍙兘鏄?/p>
A. 0.60 m
B. 0.30 m
C. 0.20 m
D. 0.15 m
銆愭潵婧愩�?/p>
2018
骞村叏鍥芥櫘閫氶珮绛夊鏍℃嫑鐢熺粺涓�鑰冭瘯鐗╃悊锛堝寳浜嵎锛?/p>
銆愮瓟妗堛�?/p>
B
銆愯В鏋愩�戝彲浠ョ敾鍑?/p>
PQ
涔嬮棿鐨勬渶绠�鍗曠殑娉㈠舰锛屽鍥炬墍绀猴細
鐐圭潧锛氳В鍐虫満姊版尝鐨勯鐩叧閿湪浜庣悊瑙ｆ尝鐨勫懆鏈熸�э紝鍗虫椂闂寸殑鍛ㄦ湡鎬ф垨绌洪棿鐨勫懆鏈熸�э紝寰楀埌娉㈤暱鐨勯�氶」锛?/p>
鍐嶆眰瑙ｅ娉㈤暱鐨勭壒娈婂�笺�?/p>
2
锛?/p>
锛堝閫夛級涓�鎸瓙娌?/p>
x
杞村仛绠�璋愯繍鍔紝骞宠 浣嶇疆鍦ㄥ潗鏍囧師鐐广�?/p>
t
=0
鏃舵尟瀛愮殑浣嶇Щ涓?/p>
-0.1 m
锛?/p>
t
=1 s
鏃朵綅绉讳负
0.1 m
锛屽垯
A.
鑻ユ尟骞呬负
0.1 m
锛屾尟瀛愮殑鍛ㄦ湡鍙兘涓?