Collision and rotation problems?

[Japser Lu]

A cube with mass M and length 2a, move in the velocity v on the friction-less horizontal table, when it closes to the end of the table, it is stopped by the long block(the height can be ignored), ask what is the value of v to topple from the table? ( note: use one side of cube as the rotating axis and moment of inertia is 8Ma²/3)

 

[mfb]

A sketch would help to understand what is going on.

What did you figure out so far? This is a necessary part of homework problem threads.

 

[Japser Lu]

A sketch would help to understand what is going on.

What did you figure out so far? This is a necessary part of homework problem threads.

I figured it out. I remember the concept of topple the object.