What is the impulse of a 3 kg object that starts from rest and moves to 20 m/s?

Question

What is the impulse of a 3 kg object that starts from rest and moves to 20 m/s?

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Thu Cúc 4 months 2021-07-14T03:53:04+00:00 1 Answers 2 views 0

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    2021-07-14T03:54:34+00:00

    Answer:

    The impulse on the object is 60Ns.

    Explanation:

    Impulse is defined as the product of the force applied on an object and the time at which it acts. It is also the change in the momentum of a body.

    F = m a

    F = m(\frac{v_{2}  - v_{1} }{t})

    ⇒     Ft = m(v_{2}v_{1})

    where: F is the dorce on the object, t is the time at which it acts, m is the mass of the object, v_{1} is its initialvelocity and v_{2} is the final velocity of the object.

    Therefore,

    impulse = Ft = m(v_{2}v_{1})

    From the question, m = 3kg, v_{1} = 0m/s and v_{2} = 20m/s.

    So that,

    Impulse = 3 (20 – 0)

                 = 3(20)

                 = 60Ns

    The impulse on the object is 60Ns.

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