A rocket weighing 9000n is fired vertically upward.The gases are expelled at a rate of 20kg/s with speed of 0.5km/s.
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Answer:
- 10^4
Explanation:
- F=(dm/dt)xVelocity
- 20x0.5x10^3 (into 10^3 to convert km/s to m/s)
- (it has nothing to do with masses of rockets)
- =10^4
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