1) The figure below shows a thin, uniform bar whose length is L and mass is M an

Question

1) The figure below shows a thin, uniform bar whose length is L and mass is M and a compact hard sphere whose mass is m. The system is supported by a frictionless horizontal surface. The sphere moves to the right with velocity v and strikes the bar at a distance 1/4L from the center of the bar. Before the collision the bar was at rest and lies perpendicular to the path of the sphere. The collision is elastic, and following the collision the sphere is at rest. Find the value of the ratio m/M. (Note that the sphere is not spinning or rolling -the surface is frictionless). m=M

Explanation / Answer

m ro v = 1/12

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