Page 6 - Odkryć fizykę
P. 6
90 1(2-%)2#!*03$*'4&( V&@+!$W
7 %%GX%?=I%d*0C0%[<57Y0.%"5#)%*8#%2#/0%857( .5F4#-5#%$0.K%.5#)T
%#I%/857(0)#C0%<57%*8#%2#/0=
%CI%/857(0)#C0%<57%./$!20%2#/0=%
%.I%/"#:#)#C0%*8#%2#/0=
%*I%-5!%/"5!-5)#C0%8#2$,E.5=
. %%GX%?=I%g#%?:#-!.5!%Q!-3<%G,%?2,"5!-53%R)%?2/05!!-5!%42#85$#.06-!%=9-:+=(6"#9-*0'"%6!<$%2H8-!% =%+#$!:5$#%
W
?,23#6F.0%<57%8,(H)%$!6%?:#-!$0%?,%,2C5.5!%,*:!4)!6%(>?R+(/+=(6"#9-*0'"%"#%?27*(,E]%vD%,(2!E:,-F%8/,2!"T
WR 2 WR
a) v = . b) v = √ . %.I%v = √3 W R. d) v = 3 √ W R.
√ 3 3
/ %%GL%?=I%i2!*-5#%,*:!4),E]%'2#-#%,*%+),W.#%6!<$%XVDU%2#/0%857(#%-5Y%E2!*-5#%,*:!4),E]%S5!"5%,*%+),W.#=%fC:5./%./#<%
6!*-!4,%,C5!43%'2#-#%8,(H)%+),W.#=%S#)HYD%Y!%$,20%?:#-!$%
01%%GX%?=I%Z0E:580%/C3*,8#)%23.K,"F%C5!Y-57%*:#%<8,5.K%.K#2$H8=%h!<$%$,%$#E"#%/#),Y,-#%-#%*8#%8#:.!D%/%($H20.K%(#Y*0%
"#%E2!*-5.7%MDLU%"=%;C0%?5!<%"H4)%C5!.%?,%C5!Y-5%/!%<$#)F%?27*(,E.5F%aLDU% (" D%8#:.!%?,85--0%80(,-08#]%,(,),T
K
%#I%aDLU% ,C2 . b) 12 ,C2 . %.I%UXD\% ,C2 . d) 6 ,C2 .
s s s s
11%%GU%?=I%>#2#:#(<#%K!:5,.!-$20./-#%485#/*0%80-,<5%γ1%j%MDLO1=%>,*#6%,*:!4),E]%$!6%485#/*0%,*%S5!"5%89?#2 $#.K%E85!$:-0.K=%
X%?#2 1
d =
γ1
12%%GL%?=I%g#%6#(5!6%80<,(,E.5%-#*%?,85!2/.K-5F%Z#2<#%?,23#%<57%<,-*#D%6!Y!:5%,C5!4#%?:#-!$7%89.5F43%./$!2!.K%4,*/5-k%
>2,"5!W%Z#2<#T%LLV^%("
23
Z#<#%Z#2<#T%\DaU%l%XM kg