Collision and momentum conservation (id: 6e7ccc15a)

本题目来源于试卷: Collision and momentum conservation，类别为 美国物理杯赛(Physics Bowl)

[单选题]
95.37: A spring is com22ajv t fy(fs z)2)nbwx-dg, qc4 3up hq6+ipapressed between two objects with unequal masses,m and M, held together by a string as shown in the figure to the right. The objects are initially at reston a horizontal frictiqqd3,+uh4cp p - ixg6aonless surface. The string is then cut. Which statement is true?

A. Kinetic energy is the same as before the string was cut.
B. The total final kinetic energy is zero.
C. The two objects have equal kinetic energy.
D. The speed of one object is equal to the speed of the other.
E. The total final momentum of the two objects is zero.


参考答案:  E


本题详细解析: 暂无

微信扫一扫，分享更方便