Just before the ball leaves her hand, what is its centripetal acceleration?

A fast pitch softball player does a “windmill” pitch, moving her hand through a vertical circular arc to pitch a ball at 67 mph. The 0.17 kg ball is 52 cm from the pivot point at her shoulder.

Answer 1

Convert mph to m/s and cm to m

(67 mi/h)(1 hr/3600 s)(1609 m/1 mi)=30 m/s

52 cm=.52 m

Centripetal acceleration equals the tangent velocity squared divided by the radius. (Ac=v²/r)

Ac=(30 m/s)²/.52 m
Ac=1700 m/s².

that doesn’t sound right but whatever.

Answer 2

i do no longer care the two way. If it facilitates a collection, then they could use it. If it hurts a collection, they do no longer could desire to be conscious it. Steve Stone and Hawk Herrelson communicate approximately this a lot in the pastime (particular, I do positioned up with those 2 on a conventional initiating). It hurts a tumbler mentally. whilst they have the pitch count extensive style extensive kind, it constantly looks to be like a one hundred-pitch shrink. So whilst they are at 70+ pitches, they are questioning of their head that they are tiring. this could have them throwing worse in this time. additionally, if a tumbler is doing sturdy, they could desire to bypass away him in there. yet with the pitch count extensive style extensive kind, that’s take him out at one hundred. on the various, a pitch count extensive style extensive kind lowers the possibility of a throwing harm and aspects the pitcher with greater efficient than adequate loosen up till finally now his next commence up. And if the bullpen is advantageous, in all probability 6-7 innings of paintings is advantageous adequate for a win. only relies upon on the gang.

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