ÌâÄ¿ÄÚÈÝ
¹âµç¼ÆʱÆ÷ÊÇÒ»ÖÖ³£¼û¼ÆʱÒÇÆ÷£¬Æä½á¹¹Èçͼ£¨1£©Ëùʾ£¬a¡¢b·Ö±ðÊǹâµçÃŵļ¤¹â·¢ÉäºÍ½ÓÊÜ×°Ö㬵±Óл¬¿é´Óa¡¢b¼äͨ¹ýʱ£¬¹âµç¼ÆʱÆ÷¾Í¿ÉÒÔÏÔʾ³öÎïÌåµÄµ²¹âʱ¼ä£®ÏÖÔÚij»¬¿éÔÚбÃæÉÏ»¬ÐУ¬ÏȺóÁ½´Îͨ¹ý¹âµçÃÅ1ºÍ2£¬¼ÆʱÆ÷ÏÔʾµÄµ²¹âʱ¼ä·Ö±ðÊÇt1=3¡Á10-2s£¬t2=5¡Á10-2s£¬´Ó¹âµçÃÅ1µ½¹âµçÃÅ2Ëù¾ÀúµÄʱ¼ät=0.11s£¬Ó÷ֶÈֵΪ1mmµÄ¿Ì¶È³ß²âÁ¿Ð¡»¬¿éµÄ³¤¶Èd£¬Ê¾ÊýÈçͼ£¨2£©Ëùʾ£¨¼ÆËã½á¹û±£ÁôÁ½Î»Ð¡Êý£©£®
£¨1£©¶Á³ö»¬¿éµÄ³¤¶ÈÊÇ______cm£®
£¨2£©»¬¿éͨ¹ý¹âµçÃŵÄËÙ¶Èv1¡¢v2·Ö±ðÊǶà´ó£¿
£¨3£©Ç󻬿éµÄ¼ÓËٶȣ®
£¨1£©¶Á³ö»¬¿éµÄ³¤¶ÈÊÇ______cm£®
£¨2£©»¬¿éͨ¹ý¹âµçÃŵÄËÙ¶Èv1¡¢v2·Ö±ðÊǶà´ó£¿
£¨3£©Ç󻬿éµÄ¼ÓËٶȣ®
£¨1£©Ð¡»¬¿éµÄ³¤¶Èd=7.30cm-4.00cm=3.30cm
£¨2£©ÓÉv=
µÃ£º
»¬¿éͨ¹ý¹âµçÃÅ1ʱËÙ¶ÈΪ£ºv=
=
m/s=1.10m/s
»¬¿éͨ¹ý¹âµçÃÅ2ʱËÙ¶ÈΪ£ºv=
=
m/s=0.66m/s
£¨3£©ÓÉa=
µÃ£º
»¬¿éµÄ¼ÓËÙ¶ÈΪ£ºa=
=
m/s2=-4.00m/s2
¸ººÅ±íʾ¼ÓËٶȵķ½ÏòÓ뻬¿éµÄÔ˶¯·½ÏòÏà·´£®
´ð£º£¨1£©Ð¡»¬°åµÄ³¤¶ÈΪ3.30cm£»
£¨2£©Í¨¹ý¹âµçÃÅ1µÄËÙ¶ÈΪ1.10m/s£¬Í¨¹ý¹âµçÃÅ2µÄËÙ¶ÈΪ0.66m/s£»
£¨3£©»¬¿éµÄ¼ÓËÙ¶ÈΪ-4.00m/s2£®
£¨2£©ÓÉv=
x |
t |
»¬¿éͨ¹ý¹âµçÃÅ1ʱËÙ¶ÈΪ£ºv=
x1 |
t1 |
3.30¡Á10-2 |
3¡Á10-2 |
»¬¿éͨ¹ý¹âµçÃÅ2ʱËÙ¶ÈΪ£ºv=
x2 |
t2 |
3.30¡Á10-2 |
5¡Á10-2 |
£¨3£©ÓÉa=
v-v0 |
t |
»¬¿éµÄ¼ÓËÙ¶ÈΪ£ºa=
v2-v1 |
t |
0.66-1.10 |
0.11 |
¸ººÅ±íʾ¼ÓËٶȵķ½ÏòÓ뻬¿éµÄÔ˶¯·½ÏòÏà·´£®
´ð£º£¨1£©Ð¡»¬°åµÄ³¤¶ÈΪ3.30cm£»
£¨2£©Í¨¹ý¹âµçÃÅ1µÄËÙ¶ÈΪ1.10m/s£¬Í¨¹ý¹âµçÃÅ2µÄËÙ¶ÈΪ0.66m/s£»
£¨3£©»¬¿éµÄ¼ÓËÙ¶ÈΪ-4.00m/s2£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿