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18 March, 14:16

If a wheel with a radius of 80 inches spins at a rate of 50 revolutions per minute, find the approximate linear velocity in miles per hour

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  1. 18 March, 14:34
    0
    W = 100 rev/min = 100 x 2 π rad/min

    v=rw = 80 x 200 π = 50240 x 1.6 x 10^ (-5) x 60 = 48 miles/hour
  2. 18 March, 14:39
    0
    (50rev/min) (2π80 in/rev) (ft/12in) (mi/5280ft) (60min/hr) = 480000π/63360 mph

    750π/99 mph or approximately

    23.8 mph (to nearest thousandth of a mph)
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