How Long Does It Take for a Car to Pass a Truck After Reaching the Speed Limit?

[kaylamalanie]

37.5 m? if the car starts at the origin, then its final position would be 62.5m and the truck starts at 50, its final position would be 100 m

 

[Sourabh N]

Perfect. Now? :)

 

[kaylamalanie]

im not sure which equation to use.

 

[Sourabh N]

Ok you know the distance between the car and truck, and you know their speeds and you need to find the time.

In terms of relative velocity, its just distance = relative velocity*time

But in case you're not familiar with relative velocity, look at it like this. Assume the car takes time T to overtake the truck. It moves a distance 25*T during this. The truck moves a distance 18*T in the meantime. Now, The car should move 37.5 m more than the truck to overtake it.