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  • A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s -2 . Calculate the initial thrust (force) of the blast.

Q5.9 A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 ms^{-2}. Calculate the initial thrust (force) of the blast.

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best_answer

Let the initial thrust be  F Newton.

Using Newton's second law of motion, we get 

                                       F\ -\ mg\ =\ ma

or                                                 F\ =\ ma\ +\ mg

                                                    F\ =\ m(a+g)\ N

Substituting values in this equation, we get :

                                          F\ =\ 20000(5+10)

or                                       F\ =\ 3\times 10^5\ N

Posted by

Devendra Khairwa

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