Question

Am nevoie de ajutor urgent! ( problemă cu Lucrul mecanic )​

Answer 1

Răspuns:

$a = g \times \sin( \alpha )$

=>

$a = \frac{10m}{ {s}^{2} } \times \frac{ \sqrt{2} }{2} = \frac{10m \sqrt{2} }{2 {s}^{2} } = \: \frac{5 \sqrt{2 \: \ \: }m }{ {s}^{2} }$

$a = \frac{v}{t} \: = > \: v = a \times t = \frac{5 \sqrt{2}m }{ {s}^{2} } \times 3s = \frac{10 \sqrt{2}m }{s}$

$v = \frac{d}{t} = > d = v \times t = \frac{10 \sqrt{2}m }{s} \times 3s = 30 \sqrt{2} m$

L = F × d = 100N × 30rad2 = 300rad2 J(Joules).

G = m×g = 50 kg × 10 N/kg = 500N

L = G × d = 500N × 30rad2 m = 15000rad2 J (Joules)