Laws Of Motion Question 240

Question: A rocket with a lift- off mass $ 3.5\times 10^{4} $

$ kg $ is blasted upwards with an initial acceleration of $ 10m/s^{2}. $ Then the initial thrust of the blast is[AIEEE 2003]

Options:

A) $ 1.75\times 10^{5}N $

B) $ 3.5\times 10^{5}N $

C) $ 7.0\times 10^{5}N $

D) $ 14.0\times 10^{5}N $

Show Answer

Answer:

Correct Answer: C

Solution:

Initial thrust must be $ m[g+a]=3.5\times 10^{4}(10+10)=7\times 10^{5}N $



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