13.
[tex]dane:\\m = 600 \ g = 0,6 \ kg\\h = 2 \ m\\g = 10\frac{m}{s^{2}}\\E_{p} = ?\\\\Rozwiazanie\\\\E_{p} = mgh\\\\E_{p} = 0,6 \ kg\cdot10\frac{m}{s^{2}}\cdot 2 \ m\\\\E_{p} = 12 \ J[/tex]
14.
[tex]dane:\\m = 10 \ kg\\W = 100 \ J\\g = 10\frac{m}{s^{2}} = 10\frac{N}{kg}\\szukane:\\h = ?\\\\Rozwiazanie\\\\F = m\cdot g = 10 \ kg\cdot10\frac{N}{kg} = 100 \ N\\\\W = F\cdot h \ \ /:F\\\\h = \frac{W}{F}\\\\h = \frac{100 \ J}{100 \ N} = \frac{100 \ kg\cdot\frac{m^{2}}{s^{2}}}{100 \ kg\cdot\frac{m}{s^{2}}}=1 \ m\\\\Odp. \ A.[/tex]
15.
[tex]dane:\\m_1 = m_2 = m\\h_1 = h\\h_2 = 2h\\szukane:\\E_{p_1}, \ E_{p_2} = ?\\\\Rozwiazanie\\\\E_{p_1} = mgh\\\\E_{p_2} = m\cdot g\cdot 2h = 2gh=2E_{p_1}\\\\Odp. \ C.[/tex]
