t = 3 s V = 90 km/h = 90 *1000 m / 3600 s = 25 m/s Vo = 0 s = ? I sposób : [latex]a = frac{Delta V }{t } = frac{V- V_0}{t } [/latex] [latex]a = frac{25 frac{m}{s} - 0 frac{m}{s} }{3 s } = 8,3 frac{m}{s^2} [/latex] [latex]s = frac{at^2}{2} [/latex] [latex]s = frac{8,3 frac{m}{s^2} * ( 3 s )^2}{2 } = 37,35 m [/latex] II sposób: [latex]s = frac{at^2}{2 } .................. extgreater a = frac{V}{t} [/latex] [latex]s = frac{ frac{V}{t} *t^2}{2 } = frac{V*t}{2} [/latex] [latex]s = frac{25 frac{m}{s} * 3 s }{2} = 37,5 m [/latex]
