What is the time taken for these 2 cars to meet?

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SUMMARY

The problem involves two cars, P and Q, initially 1400 meters apart, with car P traveling at a constant speed of 15 m/s and car Q accelerating from rest at 5.0 m/s². To determine the time taken for the cars to meet, one must equate their position equations over time. Car P's distance is calculated using the formula S = vt, while car Q's distance is derived from S = ut + 0.5at², where the initial velocity (u) is zero. The solution requires setting the sum of the distances traveled by both cars equal to 1400 meters.

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Homework Statement



Two cars, P and Q, are 1400m apart.
P is traveling at 15 ms-1, Q is accelerating from rest at 5.0 ms-2
They are traveling opposite direction(i.e. they are facing each other), what is the time taken for them to meet?
Also, what is the distance traveled by each car before meeting each other?

Homework Equations



a = \frac{v-u}{t}


The Attempt at a Solution



I got a = 5t, but it did not seem to help much...
Do I have to draw a graph for this question?
 
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nyrychvantel said:

Homework Statement



Two cars, P and Q, are 1400m apart.
P is traveling at 15 ms-1, Q is accelerating from rest at 5.0 ms-2
They are traveling opposite direction(i.e. they are facing each other), what is the time taken for them to meet?
Also, what is the distance traveled by each car before meeting each other?

Homework Equations



a = \frac{v-u}{t}


The Attempt at a Solution



I got a = 5t, but it did not seem to help much...
Do I have to draw a graph for this question?

No, just write out the position dependence over time for the two cars and equate. Assume Car 1 to b at x=0 and the second car to be at x=1400
Use
S=u*t+0.5*a*t*t (for the accelerated motion) (Use negative sign for acceleration)
S=v*t (for the constant velocity motion)
 
Thank you!
I forgot I can use area under a V-T graph of constant acceleration (and sub v=at) to get the total distance traveled by car Q.
 

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