Engineering


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  • Ex: A body of mass 2 kg moving with a velocity of 3 m/sec collides head on with a body of mass 1 kg  moving in opposite direction with a velocity of 4 m/sec. After collision, two bodies stick together and move with a common velocity which in m/sec  is equal to 
    A) 1/4      
    B) 1/3
    C) 2/3      
    D) 3/4
    Correct answer: C
    Explanation: m1v1−m2v2 = (m1 + m2)v Þ 2 × 3 − 1 × 4 = (2+1)v | Þ v = 2/3 m/s
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