14.3能量的转化和守恒-九年级上册初三物理【教材解读】（人教版）

!#"!PZ.��Y�� ()*+!PZ.��!!2*" ��&õª ! [i#�N�!!! [��L !! >�#�%!!! �Q�L !! ��#RZ!!!�L ÖC�Øÿ�!!!qL !k$!!!�DL!!!'áC!!!CL ��&÷ø %!&��ßà {|}~ �� .ú Ç�ÂÑÒJK­ m±N�­Àÿ 34LÉ�:qL KÒ�@q�µ$æ«Ð+ ~�að@($ÑcáCV m±NÐ+~U 6�. CLÉ�:qL |'áLN�Xc+N� �$!�3_YáC +N�É�¢Ç CLÉ�:NLÓÉ �:34L BM�cøÀ<ô¶�ÒJ �ÓM�¶�#�� BM±Àÿ$! ­�vP+�� 34LÉ�:qLB NL %%&�w !q­p�#L7ö÷cmçòÊV©¨É�$RSTU# ��&÷ø ã�Þg%ñò[ÕäAJ[# ÿLä�ÿañW­qLñq L%ñò[ÕäAL[# L­ñW­ÿåÉWeÿæd W©%L[ÕäAñò[# ç!Ä×��`ª«`Ô¶m% `[ÕäAä([# ��[Lè%̀ [ÕäAL[# "# ÷ø=÷: TVW}5!Õä"�!ÕK"¼ H�$%!ÕK"%­[o-+- U�%Ù[o-é?qr�ä% !Õä"ø­[o-+-qr �ä# 6h;<;= >*�W©×ê-ëìí� îïð ýÛô°{-°i¹º%z{ñ ò[»)©#Ùw�%[oâ 3Gñá%%lÎöÙÉIÀ5 ñò[ÕäA©J[%[o-> oòóU�# "L7É�#��&mñp�#LÉ�:)�p�#L#��# "��# ��&<> ѽç!lÎ`Ô¶mÉ��[Õä,ä([ô½�ç!?J#s õ$ö9$Û�C8äö� s%4÷¼ø�We-­ç!ÅÎùh- W"Y¼+,-#ýÛw"%%4÷¼r!45en-��[#» �%ÿ[$ú[8se%4��[Õän-#sù%zW*%-[oE À5n���[# ��&÷: "-!#%K�Ü��f{&î½fL7É�#{Ñ2r#Vi¢£f$ô õ#& %!!& -&ÒJîÿ&É34LÉ�:qL .&ÒJ¢N&ÉNLÉ�:34L /&N�3��µ�ɵ�J.�&ÉNLÉ�:34L 0&Ã�Ã}Ñÿ&É�DLÉ�:qL ./$ ef n� 5� - & cdr±%Éñò[ÕäAJ[ . ( cd©L%Éñò[ÕäAL[ / & L­ñW­ÿåÉÿæd°À%ÉL[ÕäAñò[ 0 & � �Æα%É�-ûØ-ä([ÕäAJ[ 01$. ()*1!PZ����!!2*33*" ^_ L7Oq±�ds�$=q±�dÕî$3K±amñp�É�:) �p�$<Samn$;É�J)�$;$òcÉ�BÉ�#��f$ L7#ì7�Øq¤# \��?@¦T&". %!&L7OPç7#���'L7OPç7&fgÁÄ��"Ä�r# âãç7ïm#fgÁf#mÕ¤���$+J/-�$oJ��¿ ;$KrvL7É�$ã�8L7OPç7# %%&L7OPç7sþ)L7É�*B)L7É�* n¬^# %$&qstL7$Lfä«_�Ü�#3p!!!ä�3&qÆc#$3 � &L7OPç7$&qöLÊ1## %6&L7OPç7#1L&GòÊ#$mñp�#L7Ç&r&$)� p�#L7V±¬�r&(L7amn$;É�Jõmn$;�$m n$;#L7Ç&&r&$õmn$;#L7V¬�&r&$L7# ì7�Øq¤# ## "��# Itµ¶e[p�Î-[oUá[GÀÕäAMÛBT|d-[ o%ßü[oÕäAPù%MÛBT|d-[o',Gm[o(�û a²³>[o-öN%�ßG-[p1mÎÏD%[o-à³eUá ��#³´µ¶e%"-Ne>/!#ûý¸p[p�þ%·´�° [p1mP%ÚÛÿmBT��-±{��# "-"#cDÀ&qL�L7#É�BOP�$­DÔcm¢¡ìil �¢�&÷VåH$�÷:)fqkl#& %!!& -&Ü�ö÷Z¤$;#qL .&ÿ¨©Z¤$;#qL&q­p�#L7#¨©É� /&cmçòÊV¡ñp�#L7ö÷©¨É� 0&L7cÉ�BÉ�#��fì±v²t$eL7#ì7ì�Ø q¤ ./$öÙáà��!?-J[%!?¨�öÙ%!?-J[»)%� ü¨!?öÙ%!?-J[û+%-efVW)±ÒÓ%U¼!?µ -J[-ÕK¿U%Õä%[o-+-U�%.ef\])U¼+-- [o%�I5ñòeáà"#Õä%/efVW)[o�Õä�ÕK- ÎÏD>pGà³%¦·L­ñ�¶åÉL[ÕäAñò[%Ù%4 /L8G±A;%GIÀ5L[ÕäAJ[%¿ÑÀ5[oÕä%Ú ÛUBT-%ßàáà!ÑÀ5[o೩%Ù[o->o>òóU �%0efVW# 01$. !"#$!!!��#$ ![o#$"%&!'()*+ ,-./[o-0123%% &!'()*�