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t=? vf=?
h= vi+gt
25=0+10×t (adios cero)
25÷10=t
2,5=t. RPTA
Ahora...
h=[vf+vi/2]t
25=[vf+0/2]0,5. (adios cero otra vez)
25=[vf/2]0,5. (el 2 pasa a multiplicar)
25×2=vf×0,5. (0,5 pasa a dividir)
50/0,5=vf
20=vf. RPTA.