How do you solves physics problems invovling velocity?
Okay, the guy above me is way wrong. speed/distance does not give velocity. Velocity is a vector, whereas speed is a scalar, both of which measure rate of change of distance in terms of time. Speed/distance gives the reciprocal value of time. The trains are both moving at 39 km/h, which means that they are traveling towards each other at 78 km/h (double). It will take the trains 0.78 hours to reach each other. Since the bird is going 60 km/h (assume no time to turn around), then just multiply that by the amount of time that the bird will be flying, 0.78, which gives a total of approximately 46.92 km.
