Minimum deaceleration untll the car stops

  • #1
what am i doing wrong??
every time i try to answer this i get t=.2s and a=-1651ms^-2

the problem reads....
A car traveling at 25mi/h is to stop on a 35m-long shoulder of the road. (a) What is the required magnitude of he minimum acceleration? (b)How much time will elapse during this minimum deaceleration untll the car stops.

i used the equation....
a=v^2/2x



:grumpy:
 

Answers and Replies

  • #2
164
0
i think the first time is to convert 25mi/h into meters per second.

~Amy
 
  • #3
227
0
Yes, use 1 mile =1.6km, and don't forget to convert to m/s, so you need to change out of km/h. 1h=3600s. That equation is right.
 
  • #4
yes i did convert to m/s wrong thanks for the help.:rofl: :tongue2:
 

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