Please answer 19

Please answer 19 1 1 Ne€Äovce on the object •zero. An aeroplane is moving uniformly at a constant height under the action of two forces upward force (lift) and (ii) downward force ('Weight). "o What i the net force on e aeroplane. «eac.&öcrn Ans. Why does a person fall when he ju ps out from t-f ewp a moving train 2 Why does a coin placed on a card, drop into the tumbler when the card is ra flicked the finger ? Why does a ball thrown vertically moving train, come back to Explain the following When a train suddenly moves passenger standing in