For many years, hitters have claimed that some baseball pitchers have the ability to actually throw a rising fastball. assuming that a top major leaguer pitcher can throw a 95-mph pitch and impart a 1800-rpm spin to the ball, is it possible for the ball to actually rise? assume the baseball diameter is 2.9 in. and its weight is 5.25 oz.

Answer

given,

speed = 95 mph

N = 1800 rpm

diameter = 2.9 in

weight = 5.25 oz

   ω = 188.5 rad/s

U = 95 x 1.467 ft/s

U = 139.33 ft/s

calculate the ratio

    ratio = 0.163

coefficient of lift corresponding to 0.163 from the lift and drag coefficient

   C_L = 0.04

ρ is the density of air

Lift produce

     L = 0.04238 lb

weight

     W = 0.32815 lb

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )

neither accurate nor precise.