{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

solution-hw24

# solution-hw24 - lai(yl8859 – HW24 – Ross –(15200 1...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: lai (yl8859) – HW24 – Ross – (15200) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A phone cord is 6 . 23 m long. The cord has a mass of 0 . 212 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0 . 851 s. What is the tension in the cord? Correct answer: 116 . 72 N. Explanation: Let : ℓ = 6 . 23 m , m = 0 . 212 kg , and Δ t = 0 . 851 s . One complete trip is a distance of 2 ℓ , so the speed is v = d total Δ t = 4 (2 ℓ ) Δ t = 8 ℓ Δ t . The linear density is μ = m ℓ , so v = radicalBigg F μ F = μ v 2 = m ℓ parenleftbigg 8 ℓ Δ t parenrightbigg 2 = 64 mℓ (Δ t ) 2 = 64 (0 . 212 kg) (6 . 23 m) (0 . 851 s) 2 = 116 . 72 N . keywords: 002 10.0 points A 2 . 8 kg block supported by a string rests on a frictionless incline. The length of the string is 0 . 2 m and its mass of 1 . 8 g ≪ 2 . 8 kg. 2 . 8 k g μ = . 2 m 26 ◦ Determine the time it takes a transverse wave to travel from one end of the string to the other. The acceleration of gravity is 9 . 8 m / s 2 ....
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

solution-hw24 - lai(yl8859 – HW24 – Ross –(15200 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online