A boat floats south on the Amazon River at a speed of 6 m/s. The boat and passengers have a combined mass of 540 kg. a. Wh

Question

A boat floats south on the Amazon River at a speed of 6 m/s. The boat and
passengers have a combined mass of 540 kg.

a. What is the momentum of the boat? (Remember, momentum is a vector
quantity.)

b. The passengers paddle backward, reducing the speed to 4 m/s. What was the
impulse applied to the boat by the paddling?

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bonexptip 5 years 2021-08-13T21:47:20+00:00 1 Answers 67 views 0

Answers ( )

  1. Philomena
    0
    2021-08-13T21:48:46+00:00
    Reply

    Explanation:

    Take south to be negative.

    a. Momentum is mass times velocity.

    p = mv

    p = (540 kg) (-6 m/s)

    p = -3240 kg m/s

    p = 3240 kg m/s south

    b. Impulse = change in momentum

    J = Δp

    Since the mass is constant:

    J = mΔv

    J = (540 kg) (-4 m/s − (-6 m/s))

    J = 1080 kg m/s

    J = 1080 kg m/s north

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