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Question

A rocket is ejecting 1kg of gases per second at a velocity of 60 km/s. The accelerating force on the rocket is.

A
60 N
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B
600 N
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C
6,000 N
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D
60,000 N
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Solution

The correct option is B 60,000 N
Given,
Mass ejection rate, mt=1kg/s
velocity, v=60km/s=60,000m/s
The accelerating force on the rocket can be given as:
F=mt×v
F=1×60,000=60,000N
The correct option is (D).

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