EXPLAIN THE FOLLOWING:


1-When a corridor train suddenly starts, the sliding doors of some compartments may open, why?


Ans-The reason is that the frame of sliding door being in contact with the floor of the train also comes in motion on start of the train, but the sliding door remain in its position due to inertia . thus  the frame moves ahead with the train while door slides opposite to the direction of motion of the train. Thus the door may open.


Related question-

1-When a train suddenly starts moving forward, the passenger standing in the compartment tends to fall backwards, why?


 2-When a hanging carpet is beaten with a stick, the  dust particals starts falling out of it, why?

 

3-On shaking the branches of a tree, the fruits fall down , why?

 

4-On striking the coin at the bottom of a pole of carrom coins with a striker, lowest coin only moves away, while the rest of the pole remain intact, why?


5-When a smooth card placed over the mouth of a tumbler is flicked sharply in the horizontal direction , the card flies away , but the coin kept over the card falls into the tumbler, why?


here is the link you can see the Answer-

https://knowledgecraker.blogspot.com/2020/06/what-is-inertia-and-their-types-related.html