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ball 1 with a mass of 100g and traveling at 10m/s to the right, elastically collides...

ball 1 with a mass of 100g and traveling at 10m/s to the right, elastically collides head on with ball 2, which has a mass of 300g and is initially traveling to the right at 5m/s. What is the final velocity of ball 1?

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Answer #1

given data

m1 = 100g = 0.1kg

m2 = 300 g =0.3kg

initial velocity u1 = 10 m/s

u2 = 5 m/s

in 1 dimension

elastic collision

the final velocity is given by

v1 = ((m1-m2) * u1 + (2m2)*u2 )/(m1 + m2)

v1 = ((0.1-0.3)*10+2*0.3*5)/(0.4)

v1 = 2.5 m/s

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