Two cars approach each other on a straight and level road. Car A is traveling at 75 km/h, due north and Car B is traveling at 45 km/h due south. Both velocities are measured relative to the ground. At a certain instant, the distance between the cars is 15 km. How long will it take, in seconds, from that instant for the two cars to meet?

Question

Kiersten Gonzalez

Physics

8 April, 23:52

Two cars approach each other on a straight and level road. Car A is traveling at 75 km/h, due north and Car B is traveling at 45 km/h due south. Both velocities are measured relative to the ground. At a certain instant, the distance between the cars is 15 km. How long will it take, in seconds, from that instant for the two cars to meet?

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Answers (1)

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Dario Graham · Answer 1

it will take the cars t = 0.125 h for them to have a distance of 15 km between them.

Explanation:

at the instant the cars are 15 km apart they gonna have to move:

75*t and 45*t respectively

where t is the time it will take them to be move until they 15 km apart, then to find the time:

75*t + 45*t = 15

120*t = 15

t = 0.125 h

Therefore, it will take the cars 0.125 hours for them to end up being 15 km apart.