(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A motorcycle cop, parked on the side of a highway is passed by a woman in a red Ferrari 308 GTS doing 90km/h. After a few attempts to get his cycle started, the officer roars off 2.00s later. At what average rate must he accelerate if 110km/hr is the top speed and he is to catch her just at the state line 2.00km away?

2. Relevant equations

3. The attempt at a solution

I first started this question by showing what i know and making all unit conversions i need to.

1)

Cop for first 2 sec

vi= 0 km/hr

Pi=0 m

a=0

Ti= 0

Tf= 2

Cop after 2 sec

vi= 0 km/hr

vf= 110 km/hr

pf= 2000 m or 2 km

Ti= 2

a= X

Woman

vi= 90 km/hr

Pi= o m

a= 0

Tf=2

2) Convert the km/hr into m/s

(110 km/hr) X (1000 m/hr) X (1/60 Min) X (1/60 Sec) = 30.56 m/s (COP)

(90 km/hr) X (1000 m/hr) X (1/60 Min) X (1/60 Sec) = 25 m/s (woman)

3) Then find out how long it takes the Woman to get to the state line.

Woman

Position Final = Vi(T)

2000m = 25(T)

T = 80 sec

4) This means that the cop has 78 sec to catch her because it takes him 2 sec to start his bike.

thats all i got...

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Tricky Word Problem

**Physics Forums | Science Articles, Homework Help, Discussion**