qpzyrhh9iy qpzyrhh9iy
  • 23-01-2021
  • Physics
contestada

hey hey i need help finding out the speed !! someone help

hey hey i need help finding out the speed someone help class=

Respuesta :

mberisso
mberisso mberisso
  • 23-01-2021

Answer:

v = 5.4 m/s

Explanation:

We use conservation of mechanical energy, that is all potential energy in the initial state, and all kinetic energy in the final state:

[tex]m*g*h=\frac{1}{2} m*v^2\\g*1.5=\frac{1}{2} v^2\\v^2=3*g=29.4\\v=\sqrt{29.4} \\v=5.42\,m/s[/tex]

which rounded to one decimal is

v = 5.4 m/s

(in agreement with the third answer on the list)

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