Question

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

Answer 1

v = 5.4 m/s

Step-by-step explanation:

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

`m*g*h=(1)/(2) m*v^2\\g*1.5=(1)/(2) v^2\\v^2=3*g=29.4\\v=√(29.4) \\v=5.42\,m/s`

which rounded to one decimal is

v = 5.4 m/s

(in agreement with the third answer on the list)