A woman stands in a boat at rest on a calm lake. She throws a 10 kg anchor off the front of the boat, which has a mass of 1,000 kg Wha

Question

A woman stands in a boat at rest on a calm lake. She throws a 10 kg anchor off the front of the boat, which has a mass of 1,000 kg
What is the initial momentum of the anchor-boat system?

A)1,000 kg m/s

B)zero because both objects are at rest.

C)1,010 kg m/s

D)10,000 kg m/s

PLEASE HELP!! I don’t understand

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Dâu 5 years 2021-08-28T14:11:19+00:00 1 Answers 81 views 0

Answers ( )

  1. Giakhanh
    0
    2021-08-28T14:12:45+00:00
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    Answer: B) zero because both objects are at rest

    Explanation:

    Given the following :

    Mass of anchor = 10kg

    Mass of boat = 1000kg

    Note : both boay and anchor are at rest, this gives a Velocity of zero

    The momentum of a body is given as the product of Mass and velocity, that is,

    Momentum = mass × velocity

    Initial Momentum of anchor-boat system =

    (mass of boat× initial velocity of boat) + (mass of anchor × initial velocity of anchor)

    Initial Velocities of boat and anchor = 0

    Therefore,

    Initial momentum = (1000 × 0) + (10 × 0)

    Initial momentum = (0 + 0) = 0

    This is ecause both objects are at rest.

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