# Two cars are 175m apart, facing each other. At that instant, the first car is traveling at 9.0 km/h [W] and is accelerating at 3.6m/s^2 [W]. The second car is traveling at a constant velocity of 21.5 m/s [E].?

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a) How long will it take for the cars to hit each other?

b) With what speed will the first car be traveling?

a) How long will it take for the cars to hit each other?

b) With what speed will the first car be traveling?

##### 1 Answer

(a)

#### Explanation:

Let the cars hit each other after time

The distance

The distance

At the point of collision, the sum of distances

Solving the above quadratic equation, as follows

But time

Hence the cars will hit each other at time

Now, the speed of first car just before collision at time