Three kids are riding on a snow sled traveling horizontally without friction at 19.8 m/s. The masses of Kid A, B, and C are 42.8 kg, 31.5 kg

Question

Three kids are riding on a snow sled traveling horizontally without friction at 19.8 m/s. The masses of Kid A, B, and C are 42.8 kg, 31.5 kg, and 25.9 kg, respectively.

What is the new velocity of the sled if Kid A jumps off vertically from the sled? (Kid A velocity = 0)

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Gia Bảo 5 years 2021-08-07T14:43:50+00:00 1 Answers 7 views 0

Answers ( )

  1. thuthao
    0
    2021-08-07T14:45:44+00:00
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    Explanation:

    Momentum is conserved:

    m₁v₁ = m₂v₂

    (42.8 kg + 31.5 kg + 25.9 kg) (19.8 m/s) = (31.5 kg + 25.9 kg) v

    v = 34.6 m/s

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