Question

Va rog frumos ajutati-ma si pe mine la fizica ​

Answer 1

$P=20 kW=2*10^4 W\\m=1000 kg=10^3 kg\\G=mg=10^3*10=10^4 N\\L=Gh=10^4*20=2*10^5 J\\P=\frac{L}{t}=>t=\frac{L}{P}=\frac{2*10^5}{2*10^4}=10 s=>t=10 s$

Answer 2

Răspuns:

Explicație:

m = 1000 kg

h = 20 m

P = 20 kW = 20 000 W

P = L/Δt => Δt = L/P

L = F*d

F = G = m*g

d = h

Δt = (m*g*h)/P

Δt = (1000kg*10N/kg*20m)/20 000 W

Δt = 10 s