13. Rotational Inertia & Energy
Energy of Rolling Motion
Multiple Choice
Multiple ChoiceA 150-g baseball, 3.85 cm in radius, leaves the pitcher's hand with 30 m/s horizontal and 20 rad/s clockwise. Calculate the ball's linear, rotational, and total kinetic energy.
A
KL = 6.75 × 104 J ;
KR = 1.78 × 105 J ;
Ktot = 2.45 × 105 J
B
KL = 67.5 J ;
KR = 1.16 J ;
Ktot = 68.66 J
C
KL = 67.5 J ;
KR = 0.46 J ;
Ktot = 68.96 J
D
KL = 67.5 J ;
KR = 0.018 J ;
Ktot = 67.52 J
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