Question

Chapman's pitch was clocked at 105.1 [mph] (169.1 km/h), which
is the fastest pitch ever recorded in MLB. A baseball diameter is
72.6 [mm] on average. Assume that the prevailing conditions were 22
degrees Celsius and 1 [atm]. Air viscosity is 18.2 [µPa*s].
Estimate the drag force in [N] and
[lb* _{f }*] when the baseball is moving
at that speed.

Answer #1

Data provided in the problem statement

Velocity of baseball ( u0 )= 105.1 mph = 169.1 km /h = 169 ( km/h) * ( 1000 m/ 1km ) * ( 1 h / 3600 s) = 46.94 m/s

Diameter of ball ( Dp ) = 72.6 mm = 0.0726 m

Air viscosity ( ) = 18.2 µPa*s = 0.0182 cP

Now drag force can be estimated by stokes law as

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 42 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago