Ch4-H4-solutions - chauhan(mmc2762 Ch4-H4 turner(56910 This...

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chauhan (mmc2762) – Ch4-H4 – turner – (56910) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 of 2) 10.0 points IF an object is moving with constant momen- tum vp = a 11 , 14 , 9 A kg · m / s , what is the magnitude oF the rate oF change oF momentum dvp dt ? Correct answer: 0 kg · m / s. Explanation: A constant momentum implies that the rate oF change oF momentum is zero. 002 (part 2 of 2) 10.0 points What is the magnitude oF the net Force acting on the object? Correct answer: 0 N. Explanation: By the Momentum Principle, Δ = v F net Δ t, iF the rate oF change oF momentum is zero, then the net Force is also zero. 003 (part 1 of 4) 10.0 points A ball whose mass is 1 . 4 kg is suspended From a spring whose sti±ness is 3 N / m. The ball oscillates up and down with an amplitude oF 15 cm. Take g = 9 . 8 m / s 2 . What is the angular Frequency ω ? Correct answer: 1 . 46385 rad / s. Explanation: The angular Frequency is given by ω = r k m = R 3 N / m 1 . 4 kg = 1 . 46385 rad / s . 004 (part 2 of 4) 10.0 points What is the Frequency? Correct answer: 0 . 232979 s - 1 . Explanation: The Frequency is given by f = ω 2 π = 0 . 232979 s - 1 . 005 (part 3 of 4) 10.0 points What is the period? Correct answer: 4 . 29223 s. Explanation: The period is given by T = 1 f = 1 0 . 232979 s - 1 = 4 . 29223 s . 006 (part 4 of 4) 10.0 points Suppose this apparatus was taken to the Moon, where the strength oF the gravitational feld is only 1/6 oF that on Earth. What would the period be on the Moon? (Consider care- Fully how the period depends on properties oF the system; look at the equation.) Correct answer: 4 . 29223 s. Explanation: This period is the same as the period you Found in part 3, since g does not enter the Formula For T . 007 10.0 points A mass oF 8 kg is connected to a hor- izontal spring whose sti±ness is 14 N / m.
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Ch4-H4-solutions - chauhan(mmc2762 Ch4-H4 turner(56910 This...

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