Explain the following:

(i) Why is it dangerous to jump out of a moving vehicle? How can the danger be minimised?

(ii) Why does a boatman push the water backward with the oars while rowing a boat?

Ans. (i) If a person jumps out of a moving vehicle, the feet will suddenly come to rest, while the rest of the body is in motion and hence he will fall down and may get hurt. This danger can be minimised by running along with moving vehicle in the same direction in which the vehicle is moving for some time, while jumping out of it.

(ii) When the boatman pushes the water backward with the oar, while rowing the boat then in accordance with Newton’s third law of motion the water reacts back and pushes the boat in forward direction.

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