Math/physics

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Known factors-weight 105 g---speed at start 60 mph---distance traveled 70 yds.
Questions
,what is the rate of decelleration?,
At what yard marker does it decellate to 35 mph
For each 5 feet higher from start - how much farther does it travel.

Thank you for your help,

Tom

  • Math/physics -

    1h = 3600 s.
    Vo=60mi/3600s * 1600m/mi = 26.7 m/s. = Initial velocity.

    d = 70yd * 3Ft/yd * 1m/3.3Ft = 63.6 m =
    Distance traveled.

    V = 35mi/3600s * 1600m/mi = 15.6 m/s. =
    Final velocity.

    1. a = (V^2-Vo^2)/2d
    a = (243.4-711.1) / 127.2 = -3.68 m/s^2.
    The neg. sign means deceleration.

    2. Yard Marker = Yo + 70yds When traveling North or East.

    Yard Marker = Yo - 70yds When traveling
    South or West.

    Yo = Yard marker at starting point.

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