a uniform mass M length L is held vertically smooth horisontal surface.

when the rod is released choose correct alternative.

 

1.  CM accelerates vertically

2.. initially, magnitude of normal reaction i s Mg

3. when rod just  becomes horizontal magnitude of normal reaction i s Mg/2

4. when rod just becomes horizontal magnitude of normal reaction i s Mg/4.

 

please do explain.

please answerr soon!!!!!!!!!!!!!!!!!!!

 

you'll defenitely get rated.