ÌâÄ¿ÄÚÈÝ
¹Ì¶¨ÔÚˮƽÃæÉϵÄÊúÖ±Çᵯ»É£¬É϶ËÓëÖÊÁ¿ÎªMµÄÎï¿éBÏàÁ¬£¬Õû¸ö×°Öô¦ÓÚ¾²Ö¹×´Ì¬Ê±£¬Îï¿éBλÓÚP´¦£¬Èçͼ3Ëùʾ£®ÁíÓÐÒ»ÖÊÁ¿ÎªmµÄÎï¿éC£®´ÓQ´¦×ÔÓÉÏÂÂ䣬ÓëBÏàÅöײºó£¬Á¢¼´¾ßÓÐÏàͬµÄËٶȣ¬È»ºóB¡¢CÒ»ÆðÔ˶¯¡£½«µ¯»É½øÒ»²½Ñ¹Ëõºó£¬Îï¿éB¡¢C±»·´µ¯£¬ÏÂÁм¸¸ö½áÂÛÖв»ÕýÈ·µÄÊÇ ( )
A.Õû¸ö¹ý³ÌÖÐÒÔB¡¢CºÍµ¯»É×é³ÉµÄϵͳ»úеÄܲ»Êغã
B.B¡¢C·´µ¯¹ý³ÌÖУ¬ÔÚP´¦Îï¿éCÓëB²»·ÖÀë
C.C¿ÉÄܻص½Q´¦
D.C²»¿ÉÄܻص½Q´¦
A.Õû¸ö¹ý³ÌÖÐÒÔB¡¢CºÍµ¯»É×é³ÉµÄϵͳ»úеÄܲ»Êغã
B.B¡¢C·´µ¯¹ý³ÌÖУ¬ÔÚP´¦Îï¿éCÓëB²»·ÖÀë
C.C¿ÉÄܻص½Q´¦
D.C²»¿ÉÄܻص½Q´¦
C
BCÅöײʱÓлúеÄÜËðʧ£¬ËùÒÔÕû¸ö¹ý³ÌÖÐÒÔB¡¢CºÍµ¯»É×é³ÉµÄϵͳ»úеÄܲ»ÊغãËùÒÔC²»»á»Øµ½Q´¦¡£ÔòA¶ÔD¶Ô¡£·´µ¯¹ý³ÌÖÐBCÇ¡ºÃ·ÖÀëλÖ㺱˴˼äûÓм·Ñ¹×÷ÓÃÇÒ¼ÓËÙ¶ÈÏàµÈ£¬P´¦´æÔÚѹÁ¦ËùÒÔ²»·ÖÀ룬B¶Ô
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÔÚÊúֱƽÃæÄÚ£¬Ò»¸ù¹â»¬½ðÊô¸ËÍä³ÉͼʾÐÎ×´£¬ÏàÓ¦µÄÇúÏß·½³ÌΪy=2.5cos(kx+)£¨µ¥Î»£ºm£©£¬Ê½ÖÐk=1m-1¡£½«Ò»¹â»¬Ð¡»·Ì×ÔڸýðÊô¸ËÉÏ£¬²¢´Óx=0´¦ÒÔv0=5m/sµÄ³õËÙ¶ÈÑظËÏòÏÂÔ˶¯£¬È¡ÖØÁ¦¼ÓËÙ¶Èg=10m/s2£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
|