Calculating Initial Acceleration

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SUMMARY

The initial acceleration of a 13,140 kg V-2 rocket bomb, with an engine thrust of 2.63 x 105 N, is calculated to be 10.2 m/s2 when accounting for gravitational force. The net force (Fnet) is determined by subtracting the gravitational force (Fg) from the thrust, resulting in Fnet = 134,228 N (upward). The gravitational force acting on the rocket is 128,772 N (downward), leading to the final acceleration calculation of 10.2 m/s2 (upward) when the rocket's mass is reduced to 4,170 kg near burnout.

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kencamarador
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calculate the initial acceleration of a 13 140 kg V-2 rocket bomb fired vertically, if the thrust of its engines is 2.63 x 10 to the power of 5 N. then calculate the rockets acceleration near "burn-out", when its mass is only 4170 kg.


So i did. Part 1.

Fnet = ma
a = fnet/m
20.01m/s^2= 263000/13140

but the correct answer is 10.2
 
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You forgot to include gravitational force.
 
ah, right right.
Fg = 13140+9.8
=128772 N (Down)

Fnet= 263000-128772
= 134228 N (Up)

Acceleration= f/m
=10.2m/s^2 (Up)

Thx.
 

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