1.
[tex]dane:\\F_{n} = 20 \ N\\\mu = 0,8\\szukane:\\T = ?\\\\T = F_{n}\cdot \mu\\\\T = 20 \ N\cdot 0,8\\\\T = 16 \ N[/tex]
2.
[tex]dane:\\F_{w} = 106 \ N\\m = 80 \ kg\\szukane:\\a = ?\\\\a = \frac{F_{w}}{m}\\\\a = \frac{106 \ N}{80 \ kg} = \frac{106 \ kg\cdot\frac{m}{s^{2}}}{80 \ kg}\\\\a = 1,325\frac{m}{s^{2}}[/tex]
3.
[tex]dane:\\v_{o} = 0\\t = 1,5 \ s\\g = 10\frac{m}{s^{2}}\\szukane:\\h = ?\\\\h = \frac{1}{2}gt^{2}\\\\h = \frac{1}{2}\cdot10\frac{m}{s^{2}}\cdot(1,5 \ s)\\\\h = 11,25 \ m[/tex]
