Asked by Adam

A pitcher can throw a ball towards the home plate at 120km per hour. When thrown, the ball curves. The curveball has a spin of 1250rpm. The ball has a mass of 100g and a radius of 2.5cm

Calculate the percentage of total KE that is in rotational KE

Answers

Answered by bobpursley
translationKE=1/2 m v^2 change m to kg, v to m/s

rotational KE=(w^2*r= 2/5 M r^2*(2pi*1250/60)^2

total: add them

decimal percent: rotatioal/total
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