physics

a car at 54 km\h is 60 km behind a truck traveling at 10 m\s. how long will it take the car to reach the truck?

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  1. Considering that the speeds are in two different units, we have to convert. The conversion rate from km/h to m/s is 1 to 0.277778.

    So the car's speed is 15 m/s.

    The distance between the car and the truck is 60000 m.

    This problem can be solved using a system of equations. Such as:

    y = 15x - 60000 //The car.
    y = 10x //The truck.

    "x" is the time in seconds.

    Using a graphing calculator and finding the point at which the two lines intersect, "x" is equal to 12000 seconds or 200 minutes or roughly 3 * (1/3) hours.

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