A drum major twirls a 91-cm-long, 480 g baton about its center of mass at 140rpm .

KE = (0.5) ( i ) (W)^2

I = the inertia of the object, a rod is (1/12) ( M ) ( R^2 )

W = (rpm*2*pi)/60

so, w = (140 * 2 * pi)/60 = 14.66

so, i = (1/12) * 0.48 * 0.91 = 0.0364

0.5 * 0.0364 * 14.66^2 = 3.91187

have fun on mastering physics, i hate it too!

This post is last updated on hrtanswers.com at Date : 1st of September – 2022