ans: 12 seconds
-list out our knowns and unknowns:
Vi=0m/s
a=5.00m/s^2
d=360m
Vf=?
t=?
-first, let’s solve for Vf. We will avoid using a formula that contains t, as we do not know that value yet. Let’s use this one:
vf^2 = vi^2 + 2ad
-Plug in your values:
vf^2 = (0^2) + 2 (5.00) (360)
vf^2 = 3600
vf = 60m/s
-solve for t. choose a formula. Here’s a good one to use:
d= (vi+vf/2)t
-plug in your values:
360=(0+60/2)t
360=30t
360/30=t
t=12 seconds
