Odpowiedź:
Siła wynosi 0,83 N.
Wyjaśnienie:
m - masa , m= 5000 g = 5 kg
t - czas , t = 2 min = 120 s
S - droga , S = 1,2 km = 1200 m
F - siła , F = ?
[tex]S = \frac{a*t^{2} }{2}[/tex] /*2
2* S = [tex]a * t^{2}[/tex] /: [tex]t^{2}[/tex]
[tex]a = \frac{2S}{t^{2} }[/tex] = [tex]\frac{2*1200m}{(120s)^{2} }[/tex] = [tex]\frac{2400m}{14400s^{2} }[/tex] = [tex]\frac{1}{6} \frac{m}{s^{2} }[/tex]
F = m * a = 5 kg * [tex]\frac{1}{6} \frac{m}{s^{2} }[/tex] = 0,83 N
