Question

How far will a freely falling object fall from rest in four seconds?

Answer 1

use the kinematics equations\[\Delta y=v _{o}t+\frac{ 1 }{ 2 }at ^{2}\]

Answer 2

we know it starts from rest so we can cancel the initial velocity part\[\Delta y=\frac{ 1 }{ 2 }a^{ 2 }\]

Answer 3

correction\[\Delta y=\frac{ 1 }{ 2 }at ^{2}\]

Answer 4

a=g and we know t=4 so just plug those in and you find delta y

Answer 5

can u just me an answer please

Answer 6

\[\Delta y=\frac{ 1 }{ 2 }*9.8*4^{2}\]\[\Delta y=4.9*16\]\[\Delta y= 78.4m\]