Asquirrel in a tree drops an acorn. how long does it take the acorn to fall 20 feet?

We use the equation of motion,

Here, S is the height, u is initial velocity and a is acceleration.

Given,

As  acorn falls from tree, therefore we take the value of and initial velocity .

Substituting these values in equation of motion,

Thus, the time taken by the acorn to fall 20  feet ( 6.096 m ) is 1.12 s.