February 6th, 2019, 12:57 PM  #11 
Global Moderator Joined: Dec 2006 Posts: 20,472 Thanks: 2039 
a=25 m/sec^2=90 km/hr^2 is incorrect.

February 7th, 2019, 07:04 AM  #12  
Banned Camp Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 125  Quote:
The OP is virtually impossible to read. Since you say a=25m/sec^2 is wrong, presumably you have access to original and have "reduced it's size" to make it "come out straight." In any event, a=2.5m/sec^2, my first guess, gave an overtake time of 11 hrs, which didn't make sense.  
February 7th, 2019, 10:47 AM  #13 
Math Team Joined: Jul 2011 From: Texas Posts: 2,885 Thanks: 1504  $95.0 \, \text{km/hr} = \dfrac{475}{18} \text{m/s}$ $145.0 \, \text{km/hr} = \dfrac{725}{18} \text{m/s}$ $v_s \cdot t = v_{p0} \cdot t + \dfrac{1}{2}a_p (t2)^2$ $\dfrac{725}{18} \cdot t = \dfrac{475}{18} \cdot t + \dfrac{1}{2}(2.50)(t2)^2$ $0 = 9t^2  136t + 36$ $t \approx 14.8 \text{s}$ 
February 7th, 2019, 12:18 PM  #14 
Senior Member Joined: Sep 2015 From: USA Posts: 2,404 Thanks: 1306  
February 7th, 2019, 02:18 PM  #15 
Global Moderator Joined: Dec 2006 Posts: 20,472 Thanks: 2039  

Tags 
catching, police, speeder 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Catching up (Please take a second)  Colbyelmore  Algebra  1  February 21st, 2016 06:44 PM 
Hangglider and racing car's race. Time of catching up  sf7  Algebra  4  April 12th, 2014 07:13 AM 