SOLUTION: Suppose a car's brakes can produce an acceleration of –7 m/s2. If the car is traveling at an initial speed of 28 m/s, what is the minimum distance necessary to stop the car?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Suppose a car's brakes can produce an acceleration of –7 m/s2. If the car is traveling at an initial speed of 28 m/s, what is the minimum distance necessary to stop the car?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 675140: Suppose a car's brakes can produce an acceleration of –7 m/s2. If the car is traveling at an initial speed of 28 m/s, what is the minimum distance necessary to stop the car?

Answer by sachi(548) About Me  (Show Source):
You can put this solution on YOUR website!
use the formula
v^2-u^2=2as
where v= final speed=0
u=initial speed= 28 m/s
a = accln=-7 m/s2
so 0-28^2=-2*7*s
or s=28*28/14=56 m
ans