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29 December, 00:28

A 1000-kg whale swims horizontally to the right at a speed of 6.0 m/s. It suddenly collides directly with a stationary seal of mass 200 kg. The seal grabs onto the whale and holds fast. What is the momentum of these two sea creatures just after their collision

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  1. 29 December, 00:36
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    Momentum after collision will be 6000 kgm/sec

    Explanation:

    We have given mass of the whale = 1000

    Initial velocity v = 6 m/sec

    It collides with other mass of 200 kg which is at stationary

    Initial momentum of the whale = 1000*6 = 6000 kgm/sec

    We have to find the momentum after collision

    From conservation of momentum

    Initial momentum = final momentum

    So final momentum = 6000 kgm/sec
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