A uniform stick 1.3 m long with a total mass of 220 g is rotated in its center. A 3.8g ball is fired through the stick midway between the pivot and one end. The ball approaches at 250 m/s and leaves at 140 m/s.
Answer 1
E=0.220*1.3^2/12
0.031
lb=3.8*(1.3/4)^2/1000
0.0004
0.0004*250*4/1.3=
0.0004*140*4/1.3+0.031*ω
solve for ω
ω=0.031/(0.0004*110*4/1.3)
0.229rad/s
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