ÌâÄ¿ÄÚÈÝ
Èçͼ¼×Ëùʾ£¬ÊúÖ±Ö±·ÅÖõÄÁ½¶Ë·â±ÕµÄ²£Á§¹ÜÖÐ×¢ÂúÇåË®£¬ÄÚÓÐÒ»¸öºìÀ¯¿éÄÜÔÚË®ÖÐÒÔ0.3m/sµÄËÙ¶ÈÔÈËÙÉϸ¡£®ÏÖµ±ºìÀ¯¿é´Ó²£Á§¹ÜµÄ϶ËÔÈËÙÉϸ¡µÄͬʱ£¬Ê¹²£Á§¹ÜˮƽÔÈËÙÏòÓÒÔ˶¯£¬²âµÃºìÀ¯¿éʵ¼ÊÔ˶¯µÄ·½ÏòÓëˮƽ·½ÏòµÄ¼Ð½ÇΪ37¡ã£¬Ôò£º£¨ÒÑÖªsin37¡ã=0.6£»cos37¡ã=0.8£©
£¨1£©¸ù¾ÝÌâÒâ¿ÉÖª²£Á§¹Üˮƽ·½ÏòµÄÒƶ¯ËÙ¶ÈΪ______m/s£®
£¨2£©Èô²£Á§¹ÜµÄ³¤¶ÈΪ0.6m£¬Ôòµ±ºìÀ¯¿é´Ó²£Á§¹Üµ×¶ËÉϸ¡µ½¶¥¶ËµÄ¹ý³ÌÖУ¬²£Á§¹ÜˮƽÔ˶¯µÄ¾àÀëΪ______m£®
£¨3£©ÈçͼÒÒËùʾ£¬ÈôºìÀ¯¿éÔÚAµãÔÈËÙÉϸ¡µÄͬʱ£¬Ê¹²£Á§¹ÜˮƽÏòÓÒ×÷ÔȼÓËÙÖ±ÏßÔ˶¯£¬ÔòºìÀ¯¿éʵ¼ÊÔ˶¯µÄ¹ì¼£ÊÇͼÖеÄ______£®
£¨1£©¸ù¾ÝÌâÒâ¿ÉÖª²£Á§¹Üˮƽ·½ÏòµÄÒƶ¯ËÙ¶ÈΪ______m/s£®
£¨2£©Èô²£Á§¹ÜµÄ³¤¶ÈΪ0.6m£¬Ôòµ±ºìÀ¯¿é´Ó²£Á§¹Üµ×¶ËÉϸ¡µ½¶¥¶ËµÄ¹ý³ÌÖУ¬²£Á§¹ÜˮƽÔ˶¯µÄ¾àÀëΪ______m£®
£¨3£©ÈçͼÒÒËùʾ£¬ÈôºìÀ¯¿éÔÚAµãÔÈËÙÉϸ¡µÄͬʱ£¬Ê¹²£Á§¹ÜˮƽÏòÓÒ×÷ÔȼÓËÙÖ±ÏßÔ˶¯£¬ÔòºìÀ¯¿éʵ¼ÊÔ˶¯µÄ¹ì¼£ÊÇͼÖеÄ______£®
£¨1£©¸ù¾ÝƽÐÐËıßÐζ¨Ôò£¬ÓУº
tan37¡ã=
£®
ÔòÓУº
v2=
=
=0.4 m/s£®
£¨2£©ÔÚÊúÖ±·½ÏòÉÏÔ˶¯µÄʱ¼äΪ£º
t=
=
s=2s£®
Ôò²£Á§¹ÜÔÚˮƽ·½ÏòÉÏÔ˶¯µÄ¾àÀëΪ£º
x=v2t=0.4¡Á2=0.8m£®
£¨3£©¸ù¾ÝÔ˶¯µÄºÏ³ÉÓë·Ö½â£¬Ô˶¯µÄ¹ì¼£Æ«ÏòºÏÍâÁ¦µÄ·½Ïò£¬ÔòÓУºÍ¼ÖеÄQ£®
¹Ê´ð°¸Îª£º£¨1£©0.4£»£¨2£©0.8£»£¨3£©Q£®
tan37¡ã=
v1 |
v2 |
ÔòÓУº
v2=
v1 |
tan37¡ã |
0.3 | ||
|
£¨2£©ÔÚÊúÖ±·½ÏòÉÏÔ˶¯µÄʱ¼äΪ£º
t=
L |
v1 |
0.6 |
0.3 |
Ôò²£Á§¹ÜÔÚˮƽ·½ÏòÉÏÔ˶¯µÄ¾àÀëΪ£º
x=v2t=0.4¡Á2=0.8m£®
£¨3£©¸ù¾ÝÔ˶¯µÄºÏ³ÉÓë·Ö½â£¬Ô˶¯µÄ¹ì¼£Æ«ÏòºÏÍâÁ¦µÄ·½Ïò£¬ÔòÓУºÍ¼ÖеÄQ£®
¹Ê´ð°¸Îª£º£¨1£©0.4£»£¨2£©0.8£»£¨3£©Q£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿