A bird is sitting on a power line. It defecates. How fast is the secretion going after 2 seconds?
1 Answer
Explanation:
I'll assume it is still in the air after
To solve this problem, we can use the formula
where

#v_y# is the velocity of the secretion at time#t = 2# #"s"# 
#v_(0y)# is the initial velocity of the secretion, which I'll assume is#0# for these purposes, although it may have required some pushing to "get it out," and would then actually have some initial speed 
#a_y# is the acceleration, which is simply#g# , which is#9.8# #"m"/("s"^2)# 
#t# is the time, which is given as#2# #"s"#
Plugging in the known variables, we have
This is its velocity, which includes a negative sign to indicate direction (it's traveling downward). If you asked just how fast it is going, then its speed is just the positive quantity
(or, if you decide to use only one significant figure,
The speed of the bird's feces after
Extra info :
Just for information, after
Some taller poles can reach heights of about