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Physics

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A 8.22 kg block initially at rest is pulled to the
right along a horizontal, frictionless surface by
a constant, horizontal force of 16.8 N.
Find the speed of the block after it has
moved 2.3 m.
Answer in units of m/s

  • Physics - ,

    First compute the acceleration,

    a = F/m = 2.044 m/s^2

    V = s

  • Physics - ,

    First compute the acceleration,

    a = F/m = 2.044 m/s^2

    Then use

    V(final) = sqrt(2 a X)

    where X is the distance travelled.

    You could also use:
    Work done on block = F*X
    = final kinetic energy,
    = (1/2)M Vfinal^2.
    and then solve for Vfinal.
    Vfinal = sqrt[2*(F/M)*x]

    You will get the same result.

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