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January 31, 2015

January 31, 2015

Posted by **Connor** on Friday, September 20, 2013 at 1:54am.

(A)Find the time it takes Kathy to overtake Stan.

(B) Calculate the distance she travels before she catches him.

(C) Calculate the speed of Kathy's car at the instant she overtakes Stan.

(D) Calculate the speed of Stan's car at the instant he is overtaken by Kathy.

- Physics -
**Henry**, Tuesday, September 24, 2013 at 8:51pmd1 = 0.5a*t^2 = 1.81*1.01^2 = 1.85 m. Head start.

V1 = a*t = 3.62*1.01 = 3.66 m/s.

d2 = 0.5a*t^2 = 1.85 + V1*t + 0.5a*t^2

2.27t^2 = 1.85 + 3.66*t + 1.81t^2

2.27t^2-1.81t^2 -3.66t - 1.85 = 0

0.46t^2 - 366t - 1.85 = 0

t = 8.43 s. To catch up.

- Physics -
**Henry**, Tuesday, September 24, 2013 at 9:06pmB. d = 0.5a*t^2 = 2.27*8.43^2 = 161.3 m.

C. V = a*t = 4.53*8.43 = 38.2 m/s.

D. 3.62*8.43 = 30.5 m/s.

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