An object has a kinetic energy of 175 J and a momentum of magnitude 25.0 kg m/s. Find the speed of the object.

Question

An object has a kinetic energy of 175 J and a momentum of magnitude 25.0 kg m/s. Find the
speed of the object.

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Thạch Thảo 5 years 2021-07-14T07:19:41+00:00 1 Answers 13 views 0

Answers ( )

  1. Calantha
    0
    2021-07-14T07:21:04+00:00
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    Answer:14 m/s

    Explanation:

    Kinetic energy(ke)=175J

    Momentum(M)=25kgm/s

    Speed=v

    Mass=m

    Ke=(m x v x v)/2

    175=(mv^2)/2

    Cross multiply

    175 x 2=mv^2

    350=mv^2

    Momentum=mass x velocity

    25=mv

    m=25/v

    Substitute m=25/v in 350=mv^2

    350=25/v x v^2

    350=25v^2/v

    v^2/v=v

    350=25v

    v=350/25

    v=14 m/s

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