Fisiki_I_2010_epanaliptiki_2010-20110604
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physics
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www.pasp-top.gr
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- 2010
( m L) (
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). ( ) L M (=dm/dx).
A) L . x .
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B) m u0 ( t=0). ku (k=.). u(t).
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www.pasp-top.gr
m ( ) U(x)=(/x2)-(/x) , x
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0. , t=0, x0=/.
i. U(x) U(x)=(/x02)[(x0/x2)-(x0/x)]
ii. Fx, .
iii. u(x). iv. x u(x,t) ; v. (iv)
F(x).
) .
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) ;
) Lorentz
x'= (x-ct), z'=z, y'=y, t'= (t-x/c), =u/c, =1/(1-2)1/2
x2+y2+z2-c2t2= x'2+ y'2+ z'2- c2t2
: F= -gradU=- U
