SOLUTION: speed of a dropped object. If we neglect the resistnace of air, the (downward) speed of an object t seconds after being dropped is given by v=32t feet per second. How many second

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: speed of a dropped object. If we neglect the resistnace of air, the (downward) speed of an object t seconds after being dropped is given by v=32t feet per second. How many second      Log On


   

Question 41864: speed of a dropped object. If we neglect the resistnace of air, the (downward) speed of an object t seconds after being dropped is given by v=32t feet per second. How many seconds does it take an object to reach a downward speed of 100 miles per hour? recall that there are 5280 feet in one mile, since you will need to express 100 mph in feet per second.
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay...we can convert mph to fps via the relationship
60 miles per hour = 88 feet per second so that
100 miles per hour = 146 2/3 feet per second.
Thus we solve for t and get
t = v/32
t = (146 2/3) / 32
t = 55/12 sec = 4 7/12 sec