If a piece of wood dropped from a tall building has rezched a velocity of 68.6 m/s , how long has it been falling

It takes 7.0s for a piece of wood to be falling from a tall building in the velocity of 68.6 m/s

Explanation:

v = u + at

68.6 ms^-1 = 0 ms^-1 + (9.8 ms^-2 x t)

t = 68.6 ms^-1 / 9.8 ms^-2

t = 7.0s

It takes 7.0s for a piece of wood to be falling from a tall building in the velocity of 68.6 m/s

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

it is a negative acceleration