The total time the dog is in freefall.

Question

An athletic dog leaps vertically to catch a frisbee, leaving the ground with a speed of 4.31m/s. Find the total time the dog is in freefall.

Answer 1

First write out what variables we know.

acceleration = -9.8m/s²

initial velocity = 4.31m/s

final velocity = -4.31m/s

Then write out what is unknown.

time =?

The equation that uses these four variables is

a = (v_f - v₀)/t or v_f = at + v₀

Plug in and solve for time.