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 $
