Answer:
(a) Jet aeroplanes and
rockets work on the principle of third law of motion. In this case, the hot
gases come out of a nozzle with great force, i.e., action and the rocket moves
with high speed upwards as a reaction.
(b) If we fill a
balloon with air and hold it with its mouth downwards, then when release the
balloon, the air rushes out vertically downwards (action). The balloon moves
vertically upwards (reaction).
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