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17 November, 23:01

During a snowball fight two balls with masses of 0.4 and 0.6 kg, respectively, are thrown in such a manner that they meet head-on and combine to form a single mass. The magnitude of initial velocity for each is 15 m/s. What is the speed of the 1.0-kg mass immediately after collision?

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  1. 17 November, 23:10
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    the speed of the snow ball after collision is equal to 3 m/s

    Explanation:

    given,

    mass of the two balls

    m₁ = 0.4 Kg

    m₂ = 0.6 Kg

    initial velocity of each ball = v₁ = 15 m/s

    Speed of 1 Kg mass after collision = ?

    using conservation of momentum

    m₁ v₁ - m₂ v₁ = (m₁+m₂) V

    negative velocity shows that second ball is moving in opposite direction.

    0.4 x 15 - 0.6 x 15 = (1) V

    V = - 3 m/s

    Hence,

    the speed of the snow ball after collision is equal to 3 m/s
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