Question

A rocket with a lift-off mass $ 3.5\,\times {{10}^{4}}\,kg $ is blasted upwards with an initial acceleration of $ 10\,m/{{s}^{2}} $ . Then the initial thrust of the blast is

• A. $ 3.5\times {{10}^{5}}\,N $
• B. $ 7.0\,\times {{10}^{5}}\,N $
• C. $ 14.0\,\times {{10}^{5}}\,N $
• D. $ 1.75\,\times {{10}^{5}}\,N $

Answer 1

Answer: (A)

Here, thrust force is responsible to accelerate the rocket, so initial thrust of the blast. $ =ma $ $ =3.5\times {{10}^{4}}\times 10 $ $ =3.5\times {{10}^{5}}N $