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# solution12 - fullwood(tf5349 Quiz Linear Momentum...

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fullwood (tf5349) – Quiz Linear Momentum – Catala – (49033) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points A revolutionary war cannon, with a mass of 2100 kg, fires a 24 . 4 kg ball horizontally. The cannonball has a speed of 109 m / s after it has left the barrel. The cannon carriage is on a flat platform and is free to roll horizontally. What is the speed of the cannon immedi- ately after it was fired? Correct answer: 1 . 26648 m / s. Explanation: Let : m = 24 . 4 kg , M = 2100 kg , and v = 109 m / s . The cannon’s velocity immediately after it was fired is found by using conservation of momentum along the horizontal direction: M V + mv = 0 ⇒ - V = m M v where M is the mass of the cannon, V is the velocity of the cannon, m is the mass of the cannon ball and v is the velocity of the cannon ball. Thus, the cannon’s speed is | V | = m M | v | = 24 . 4 kg 2100 kg (109 m / s) = 1 . 26648 m / s .

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solution12 - fullwood(tf5349 Quiz Linear Momentum...

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