ÌâÄ¿ÄÚÈÝ
ʵÑéÊÒÀûÓôòµã¼ÆʱÆ÷Ñо¿Ð¡»¬¿éµÄÔ˶¯Çé¿ö£¬´ò³öÈçͼËùʾµÄÖ½´ø£¬ÆäÖÐÖ½´øB¶ËÓ뻬¿éÏàÁ¬½Ó£¬¼ÆʱÆ÷½ÓÔÚƵÂÊΪ50HzµÄ½»Á÷µçÔ´ÉÏ£®Çë»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©Ö½´øÖÐAB¶ÎÔ˶¯µÄʱ¼äΪ £®
£¨2£©¸ù¾ÝÖ½´øÇëÅжϸû¬¿éµÄÔ˶¯ÊôÓÚ £¨Ìî¡°ÔÈËÙ¡±¡¢¡°ÔȼÓËÙ¡±»ò¡°ÔȼõËÙ¡±£©Ö±ÏßÔ˶¯£®
£¨3£©´ÓÖ½´ø¿ÉÒÔ²â³öA¡¢BÁ½µãÎʵľàÀëΪ £¬»¬¿éµÄ¼ÓËٶȴóСΪ £¨¼ÆËã½á¹û±£ÁôÈýλÓÐЧÊý×Ö£©£®
£¨1£©Ö½´øÖÐAB¶ÎÔ˶¯µÄʱ¼äΪ
£¨2£©¸ù¾ÝÖ½´øÇëÅжϸû¬¿éµÄÔ˶¯ÊôÓÚ
£¨3£©´ÓÖ½´ø¿ÉÒÔ²â³öA¡¢BÁ½µãÎʵľàÀëΪ
·ÖÎö£º¸ù¾ÝÏàÁÚ¼ÆÊýµã¼äµÄ¾àÀëµÄ±ä»¯ÅжÏËٶȵı仯£®
ÀûÓúÁÃ׿̶ȳ߲â³öAB¼äµÄ¾àÀ룮
Ó¦ÓÃÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2Çó³ö¼ÓËٶȣ®
ÀûÓúÁÃ׿̶ȳ߲â³öAB¼äµÄ¾àÀ룮
Ó¦ÓÃÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2Çó³ö¼ÓËٶȣ®
½â´ð£º½â£º£¨1£©ÓÉÓÚÏàÁÚ¼Æʱµã¼äµÄʱ¼ä¼ä¸ôΪ0.02s£¬
Ö½´øÖÐAB¶ÎÔ˶¯µÄʱ¼äΪ0.08s£®
£¨2£©ÔÚͼÖз¢ÏÖ´Ó´òAµãµ½´òBµãµÄ¹ý³ÌÖУ¬ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬ÏàÁÚ¼ÆʱµãµÄλÒƼä¸ôÔ½À´Ô½´ó£¬ËùÒÔÖ½´øµÄËÙ¶ÈÔ½À´Ô½´ó£¬ËùÒÔÕâ¶Îʱ¼äÄÚС³µ×öÔȼÓËÙÔ˶¯£®
£¨3£©´ÓÖ½´ø¿ÉÒÔ²â³öA¡¢BÁ½µã¼äµÄ¾àÀëΪ9.20cm
ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2µÃ³ö£º
a=
=
=5m/s2
¹Ê´ð°¸Îª£º£¨1£©0.08s
£¨2£©ÔȼÓËÙ
£¨3£©9.20cm£¬5m/s2
Ö½´øÖÐAB¶ÎÔ˶¯µÄʱ¼äΪ0.08s£®
£¨2£©ÔÚͼÖз¢ÏÖ´Ó´òAµãµ½´òBµãµÄ¹ý³ÌÖУ¬ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬ÏàÁÚ¼ÆʱµãµÄλÒƼä¸ôÔ½À´Ô½´ó£¬ËùÒÔÖ½´øµÄËÙ¶ÈÔ½À´Ô½´ó£¬ËùÒÔÕâ¶Îʱ¼äÄÚС³µ×öÔȼÓËÙÔ˶¯£®
£¨3£©´ÓÖ½´ø¿ÉÒÔ²â³öA¡¢BÁ½µã¼äµÄ¾àÀëΪ9.20cm
ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2µÃ³ö£º
a=
¡÷x |
t2 |
0.20cm |
(0.02s)2 |
¹Ê´ð°¸Îª£º£¨1£©0.08s
£¨2£©ÔȼÓËÙ
£¨3£©9.20cm£¬5m/s2
µãÆÀ£ºÏàͬµÄʱ¼ä¿´¾àÀëµÄ±ä»¯£¬´Ó¶øÀ´ÅжÏÖ½´øµÄÔ˶¯Çé¿ö£®
ÖªµÀºÁÃ׿̶ȳ߶ÁÊýʱҪ½øÐйÀ¶Á£®
ÖªµÀºÁÃ׿̶ȳ߶ÁÊýʱҪ½øÐйÀ¶Á£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿