Răspuns:
L = 8 m
h = 2 m
F = 250 N
g = 10 N/kg
m = ?
Pai, avem relatia
[tex]a = g \times \sin( \alpha ) [/tex]
[tex] \sin( \alpha) = \frac{h}{l} = \frac{2}{8} = \frac{1}{4} = 0.25[/tex]
a = 10 N/kg × 0,25 = 2,5 m/s^2
F = 250 N
F = m×a => m = F/a = 250 N / (2,5 m/s^2) = 100 kg.
Nu uita formulele :
a = g × sin alfa
F = m×a
Ajuta mult in mecanica
:)
