本题目来源于试卷: 美国2021年物理杯赛真题 PHYSICS BOWL 2021，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A motorcycle has a total mass of 150 kg. Each wheel has a mass of 10 kg and a radius of 30 cm. Asthe motorcycle is moving, what is the ratio of the rotational kinetic energy of the wheels to the totaltranslational kinetic energy of the motorcycle? Assume the wheels are uniform disks and rollwithout slipping.
A. 0.033:1
B. 0.067:1
C. 0.33:1
D. 0.67:1
E. 3.3:1
参考答案: B
本题详细解析:
$KE_{translational} = \frac{1}{2} mv^2$;$KE_{rotatational} = \frac{1}{2}Iw^2$
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