When Maggie applies the brakes of her car, the car slows uniformly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign?

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Answer 1 · 2015-12-22T17:06:46

#18.75"m"#

Find the acceleration using:

#v=u+at#

#:.0=15+(axx2.5)#

#:.a=-6"m/s"^2#

Now use:

#s=ut+1/2at^2#

#:.s=15xx2.5-0.5xx6xx2.5^2#

#s=18.75"m"#