Question

Ayudenme plssssss! :'''''''''"'''''''(

Answer 1

Si las alturas que nos dan son respectos a la esfera tonces seria:

EpgA= mgh

EpgA= 2*9.8*12

EpgA= 235.2 J

Em=EpgA

EpgB= mgh

EpgB= 2*9.8*8

EpgB=156.8 J

Em=EpgB+EcB

EcB= Em-Epgb

EcB=  235.2 - 156.8

EcB=78.4 J

EcB= m*v²/2

v² = (EcB*2)/m

v² = 78.4*2/2

v² = 78.4

v = √78.4

v= 8.85 m/s   (Velocidad en B)