<em>The acceleration of the rocket during launch is </em>
<u>Explanation:</u>
The rocket works on the principle of Newton’s third law which states that every action has an equal and opposite reaction. The average thrusting force from the momentum is given as
Here Δp is the change in momentum during the process of launching and Δt is the time taken by the rocket to attain its maximum speed for launching.
We also know that and from Newton’s second law of motion.
As the mass of the rocket will be constant during launching so Δp will have only variation in velocity. Thus the acceleration during launch of rocket will be
<em>Thus the launching acceleration is 1600 ms-2.
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The buoyant force must be greater to float, otherwise it would sink, its like a barrel in water, the more water weight in it the more it sinks, the more air weight the more it rises.
12 V is the f.e.m. of the battery. The potential difference that is applied to the motor is actually the fem minus the voltage drop on the internal resistance r: this is equal to the voltage drop on the resistance of the motor R: so we can write: and using and we can find the current I: