Question

ajutor va rog rapidd​

Answer 1

1. g1=K•Mp/R²

g2=K•Mp/(R+h)²

g1/g2=169 => (R+h)²/R²=169 <=>R²+2Rh+h²=169R²<=>

h²+2Rh-168R²=0

delta =(2R)²+4•168R²=4R²+4•168R²=4•169R² => radical din delta = 2•13R

h1=(-2R-2•13R)/2= - 28R/2=-14R Nu convine ( valoare negativa)

h2=(-2R+2•13R)/2=24R/2=12R=12•6400=76800 m

2. Cade liber => viteza initiala este nula ( Vo=0)

V=Vo+at ( formula generala)

V=Vo+gt ( pentru cadere libera) => V=10•12=120 m/s= (120/1000)/(1/3600)=120•3600/1000=12•36=432 km/h