Asked by Gloria

A ball of mass 5kg moving with a velocity of 10 collides with a 15kg ball moving with a velocity of 4.if both balls stick together after collision, calculate their common velocity after impact if they initially move in opposite and the same direction
Answered by oobleck
opposite, 5kg ball moving in the + direction:
5(-10) + 15(4) = (5+15)v
v = 1/2

do again, with both moving in the + direction.
Answered by oobleck
rats -- I did it with 5kg moving in the - direction.
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