Е=Ue
E=mV²/2
Ue=mV²/2
m(V²2-V²1)/2=Ue
V²2-V²1=2Ue/m
V²2=2Ue/m +V²1
V2=√2Ue/m +V²1
V2=√2*20*10³*1,6*10^-19/9,1*10^-31 +0
=√7,0329*10¹⁵=√70,329*10¹⁴=8,366*10⁷м/с
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Verified answer
Е=Ue
E=mV²/2
Ue=mV²/2
m(V²2-V²1)/2=Ue
V²2-V²1=2Ue/m
V²2=2Ue/m +V²1
V2=√2Ue/m +V²1
V2=√2*20*10³*1,6*10^-19/9,1*10^-31 +0
=√7,0329*10¹⁵=√70,329*10¹⁴=8,366*10⁷м/с