3 ZADANIA DZIEKUJE Z GÓRY <33333

[latex]1.\dane:\m = 2kg\W = 4J\szukane:\v = ?[/latex] [latex]E = Ep = Ek\Ep = 0\E = Ek = mv^{2}/2\mv^{2} = 2E\v^{2} = 2E/m\v = sqrt{frac{2E}{m}}[/latex] [latex]v = sqrt{frac{2 * 4J}{2kg}[/latex] [latex]v = 2m/s[/latex] [latex]2.\dane:\m = 60kg\g = 10m/s^{2}\szukane:\Fg = ?[/latex] [latex]Fg = m * g = 60kg * 10m/s^{2}\F = 600N = 0,6kN[/latex] [latex]3.\dane:\v = 10m/s\g = 10m/s^{2}\h = ?[/latex] [latex]Ep = Ek\mgh = mv^{2}/2\2gh = v^{2}\h = frac{v^{2}}{2g}[/latex] [latex]h = frac{(10m/s)^{2}}{2 * 10m/s^{2}}[/latex] [latex]h = 5m[/latex]