Hola Mayra
Usaremos las dos fórmulas de M.
R. U.
A . <img src="https://tex.z-dn.net/?f=%5Cboxed%7BS%3DSo%2BVo.t%2B-%20%5Cfrac%7B1%7D%7B2%7D%20at%20%5E%7B2%7D%20%7D------%5C%20%5Ctextgreater%20%5C%20%28I%29%20%20%5C%5C%20%5C%5C%20%5Cboxed%7BV%3DVo%2B-at%7D----------%5C%20%5Ctextgreater%20%5C%20%28II%29" />
<img src="https://tex.z-dn.net/?f=Datos%3A%20%5C%5C%20a%3D3m%2F%20s%5E%7B2%7D%20%20%5C%5C%20So%3D0%20%5C%5C%20S%3D150m%20%5C%5C%20Vo%3D0%20%5C%5C%20t%3D%3F%20%5C%5C%20Vf%3D%3F%20%5C%5C%20Usaremos~la~fo%27rmula%20%28I%29%2C%20para%20~calcular~%28t%29%20%5C%5C%20Reemplazando~datos~en~la~fo%27rmula%28I%29%20%5C%5C%20150%3D0%2B0.t%2B%20%5Cfrac%7B1%7D%7B2%7D%203t%5E%7B2%7D%20%20%5C%5C%20150%3D%20%5Cfrac%7B3%7D%7B2%7D%20%20t%5E%7B2%7D%20%20%5C%5C%20%20t%5E%7B2%7D%20%3D100%20%5C%5C%20t%3D%20%5Csqrt%7B100%7D%20%20%5C%5C%20%5Cboxed%7B%5Cboxed%7Bt%3D10s%7D%7D--%5C%20%5Ctextgreater%20%5C%20el~tiempo~que~hizo~el~recorrido." />
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔
Ahora ya que tenemos el tiempo(t), reemplazamos el valor del (t) en la segunda(II) formula para calcular la velocidad así :
<img src="https://tex.z-dn.net/?f=V%3DVo%2Bat~~--%5C%20%5Ctextgreater%20%5C%20reemplazamos~datos~y%20~el~valor~de%5Bt%3D10s%5D.%20%5C%5C%20V%3Do%2B3.10%20%5C%5C%20%5Cboxed%7B%5Cboxed%7BV%3D30m%2Fs%7D%7D--%5C%20%5Ctextgreater%20%5C%20la~velocidad~que%20~llego%27" /> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Espero te sirva, saludos!