On Yo u r Ow n
Use th e inform ation ab o u t the form ula s = V 3 0\fd an d the table of coefficients of friction
on page 613.
The speed lim it on Lincoln Street is 45 m i/h. The street is paved w ith cem ent. A car left skid
m arks from Ashton Road to M ulberry Avenue, as show n in th e diagram below.Co m p l e t i n g t h e Pe r f o r m a n c e Task
Look back at your results from th e Apply W hat You've L earned sections in Lessons 10-1,
10-2, an d 10-5. Use th e w ork you did to com plete th e following.- Solve th e problem in the Task D escription on page 613 by determ ining w h eth er
the driver o n P ine Street was traveling w ithin th e speed limit. T hen d eterm in e the
m axim um length of th e skid m arks left on Pine Street by a car th at travels w ithin the
speed limit. R ound your answ er to the n ea rest foot. Show all your w ork an d explain
each step of your solution.
@ 2. Reflect Choose one of the M athem atical Practices below an d explain how you applied
it in your w ork on the P erform ance Task.
MP 1: Make sense of problem s an d persevere in solving them.
MP 4: M odel w ith m athem atics.
MP 5: Use appropriate tools strategically.
MP 6: Attend to precision.
To solve th ese
problem s you
will pull t o g e t h e r
many concepts
and skills th a t
you have stu d ied
about radical
expressions and
equations.
D eterm ine w h e th e r th e car was traveling w ithin th e speed lim it w h en th e driver applied the
brakes. Justify your response.652 Chapter 10 Pu l l It A l l To g e t h e r