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1 December, 02:28

In a shuffleboard game, the puck slides a total of 12 m on a horizontal surface before coming to rest. if the coefficient of kinetic friction between the puck and board is 0.10, what was the initial speed of the puck?

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  1. 1 December, 02:40
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    Given that,

    Puck slide total Deltax = 12m

    Puck and board Mk = 0.10

    Find the initial speed = ?

    We know that,

    Vf^2-Vi^2 = 2a Deltax

    -Vi^2 = - 2MkgDeltax ... (1)

    then,

    fk = - Mk mg = ma

    a = - Mkg ... (2)

    From equation (1),

    Vi^2 = 2MkgDeltax

    Vi = âš2MkgDeltax [g=9.8m/s^2]

    Vi = âš2 (0.10) (0.98) (12)

    Vi = âš0.2 (9.8) (12)

    Vi = âš1.92 (12)

    Vi = âš23.52

    Vi = 4.8 m/s

    Therefore the initial speed of the puck Vi = 4.8 m/s
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