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15 November, 14:41

A 1500 kg car traveling at 90 km/hr East collides with a 3000 kg truck traveling at 60 km/hr South. They stick together and move which direction?

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  1. 15 November, 14:57
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    They both move towards South direction.

    Explanation:

    NB: The car traveling due east must be backing west and the car traveling due south must be backing north.

    From their momentum in calculation below:

    Momentum of the car traveling east is MU = 1500x90x1000/3600 = 37,500kgm/s.

    Momentum of car traveling due South = MU = 3000x60x1000/3600 = 50,000. So, from here we see the the momentum of the car moving south has the high momemtum so they stick together and move towards the direction of south.
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