v = Vo + a t = -9.8 t
z = Zo + Vo t + (1/2) a t^2
0 = 20 + 0 + 4.9 t^2
so
t = sqrt (20/4.9)
and
v = -9.8 sqrt (20.4.9)
an object of mass 10kg is dropped from a 20 m cliff. what is the velocity just before the object strikes the ground?
2 answers
bjhvjhvh