Zadanie 3.
[tex]T_1=\frac{mV_1^2}{2}\\T_2=\frac{mV_2^2}{2}\\\frac{T_2}{T_1}=\frac{mV_2^2}{2}\cdot\frac{2}{mV_1^2}=\left(\frac{V_2}{V_1}\right)^2\\\frac{T_2}{T_1}=\left(\frac{16}{4}\right)^2=16[/tex]
Energia wzrosła 16 razy
Zadanie 4.
[tex]P=\frac{\Delta W}{\Delta t}=\frac{F\Delta s}{\Delta t}\\P=\frac{80N\cdot 5m}{2s}=200W[/tex]
pozdrawiam
