### What is the velocity of rocket after the fuel has burned

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Q. An 82 g arrow is fired from a bow whose string exerts an average force of 95N on the arrow over a distance of 77.00 cm. What is the speed of the arrow as it leaves bow?

Q. A 4.0 kg model rocket is launched, expelling 49.0g of burned fuel from its exhaust at a speed of 555m/s. What is the velocity of rocket after the fuel has burned? Hint: Ignore the external forces of gravity and air resistance.

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