melanielucero
contestada

You throw a stone vertically upward with an initial speed of 6.4 m/s from a third-story office window.
A) Find the speed of the stone just before it hits the ground.
Hint: the time is 2.3 s

Respuesta :

6SAD6BOY6
-12 = 6.2*t - 4.9*t² → t = 2.32 sec (quadratic formula) 

V = Vi -g*t = 6.2 - 9.8*2.32 = -16.5 m/s

Otras preguntas