fizyka plis :) na jutro pliss

ZAD. 1  [latex]a) Dane :\Delta v = 6 [ frac{m}{s}]\Delta t = 3[s]\\Szukane :\a = ? \\rozwiazanie :\a = frac{Delta v}{Delta t} \\a = frac{6}{3} = 2[ frac{m}{s^2}] [/latex] [latex]b) Dane :\t = 10[s]\a = 2 [ frac{m}{s^2}] \t_1 = 3 [s]\v = 6[ frac{m}{s} ] \t_2 = 7[s]\\Szukane :\v_s_r = ? \\rozwiazanie :\v_s_r = frac{s_1+s_2}{t} \\s_1 = frac{1}{2}at_1 ^2 \\v = frac{s}{t} \s_2 = vt_2\\s_1 = frac{1}{2}cdot 2 cdot 3^2 = 9[m]\\s_2 = 6 cdot 7 = 42[m] \\\v_s_r = frac{9+42}{10} = 5,1[ frac{m}{s}] [/latex] ZAD.2  [latex]Dane:\m = 8[kg]\F_c = 32[N]\F_t = 8[N] \\Szukane :\a = ? \\rozwiazanie :\a = frac{F}{m } = frac{F_c-F_t}{m} \\a = frac{32-8}{8} = 3[ frac{m}{s^2} ] [/latex] ZAD.3 [latex]Dane:\m_1 = 65[kg]\m_2 = 1115 [kg]\g = 10 [ frac{N}{kg}] \\Szukane :\Q = ? \\Rozwiazanie :\Q = mg = (m_2-m_1) cdot g \\Q = (1115 - 65 ) cdot 10 = 10500 [N] [/latex]