Mary is driving a car of mass 900 kilograms toward the north with a velocity of 22 meters/second. Danny is driving his 900-kilogram car with a velocity of 15 meters/second toward the east. They collide and both cars move together afterwards. What is the magnitude of the resultant momentum of the cars after the collision?

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  1. They are at 90 degrees to each other.

    momentum mary=900*22^2
    momentum Danny=900*15^2

    resulatant=sqrt(danny^2 + mary^2)
    = 900(sqrt(15^2+22^2)

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