3. A jet airplane travelling at the speed of 500 km/
hejects its products of combustion at the speed
of 1500 km/h relative to the jet plane. What is
the speed of the latter with respect to an observer
on the ground?
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Answer:
2000 km/h
Explanation:
the speed of the latter with respect to an observer on the ground
= 1500 km/h + 500 km/h = 2000 km/h
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