Laws Of Motion Question 232

Question: A rocket is ejecting $ 50g $ of gases per sec at a speed of $ 500m/s. $ The accelerating force on the rocket will be [Pb. PMT 2002]

Options:

A) $ 125N $

B) $ 25N $

C) $ 5N $

D) Zero

Show Answer

Answer:

Correct Answer: B

Solution:

$ F=u\ ( \frac{dm}{dt} )=500\times 50\times {{10}^{-3}}=25N $



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