Question

ÖÊÁ¿m=1kgµÄÖʵ㿪ʼ¾²Ö¹ÔÚxoyƽÃæÉÏÔ­µãO£¬Ä³Ò»Ê±¿ÌÊܵ½ÑØ+x·½ÏòºãÁ¦F₁£½2NµÄ×÷Óá£ÈôÁ¦F₁×÷ÓÃÒ»¶Îʱ¼ät₁µ½´ïAµã£¨Í¼ÉÏλÖÃδ֪£©ºó³·È¥£¬Á¢¼´Ê©¼ÓÑØyÖá·½ÏòµÄÁ¦F₂£¬ÔÙ¾­Ê±¼ät₂=2s£¬ÖʵãÇ¡ºÃͨ¹ý¸ÃƽÃæÉϵÄBµã£¬ÈçͼËùʾ£¬BµãµÄ×ø±êΪx = 12m£¬y =4m¡£ÔÚBµãʱ³·È¥F₂²¢Á¢¼´Ê©¼ÓÁ¦F₃£¬¾­¹ýt₃=2sÖʵ㵽´ïCʱËٶȸպÃΪÁã¡£²»¼ÆÆäËü×÷Óá£
£¨1£©ÇóÁ¦F₂´óС£»
£¨2£©ÇóÁ¦F₁µÄ×÷ÓÃʱ¼ät₁£»
£¨3£©ÇóÁ¦F₃µÄ´óСºÍ·½Ïò£»
£¨4£©ÔÚͼÉϱê³öCµãµÄλÖᣣ¨²»±Øд³ö¼ÆËã¹ý³Ì£©

Answer 1

£¨1£©2N £¨2£©2s
£¨3£©Á¦F₃·½ÏòÑØv_BµÄ·´·½Ïò¼´ÓëxÖḺ·½Ïò³É45⁰½ÇбÏòÏÂ
£¨4£©C×ø±êÊÇ£¨16m£¬8m£©

£¨1£© Ñо¿ÖʵãÑØ+y·½ÏòµÄÔ˶¯£¬ÓÐ
     a =      F₂ = ma_y = 2N£¨3·Ö£©
£¨2£© ÔÚÁ¦F₁×÷ÓõÄʱ¼äÄÚ£¬ÖʵãÑØ+x·½Ïò×öÔȼÓËÙÖ±ÏßÔ˶¯£¬Ôò

ÔÚ³·È¥F₁ʱ£¬ÖʵãÑØ+x·½ÏòÔ˶¯µÄËÙ¶ÈΪ
        
Ôò t₁ =" 2s   " £¨4·Ö£©
£¨3£©£¨4·Ö£©
ÖʵãÔÚBµãµÄËÙ¶Èv_x=a_xt₁="4m/s  " v_y=a_yt₂=4m/s
ËùÒÔ
·½ÏòÓëˮƽµÄ³É¦Á£½45⁰             

 £¨3·Ö£©                    
ÓÉÌâÒâ,Á¦F₃·½ÏòÑØv_BµÄ·´·½Ïò¼´ÓëxÖḺ·½Ïò³É45⁰½ÇбÏòÏ£¨1·Ö£©£¬
£¨4£©C×ø±êÊÇ£¨16m£¬8m£©£¨2·Ö£©