Question

quien me ayuda a resolver este ejercisio?

Answer 1

Vf²=Vi²+2gh
Vi=0
Vf= √(0+2(9.8)(20)
Vf= √392
Vf=19.8 m/seg
Velocidad final = 19.8 m/seg
Vf=vi + gt
Vi=0
T=Vf/g
T=19.8/9.8
T= 2.02 seg