A wave pulse is travelling on a string of linear mass density 6 . 4 × 10 - 3 kg m - 1 under a load of 80 kgf . Calculate the time taken by the pulse to traverse the string, if its length is 0 . 7 m

Question

A wave pulse is travelling on a string of linear mass density 6 . 4 × 10 - 3 kg m - 1 under a load of 80 kgf . Calculate the time taken by the pulse to traverse the string, if its length is 0 . 7 m, 2 × 10 - 3 s, 3 × 10 - 3 s, 4 × 10 - 2 s, 5 × 10 2 s

MARKS App · Accepted Answer

Here, T = 80 kgf = = 80 × 9 .8 N ; m = 6 .4 × 10 − 3 kg m -1 Now, υ = T m = 8 0 × 9 · 8 6 · 4 × 1 0 - 3 = 3 5 0 m s -1 Therefore, time taken by the wave pulse to traverse 0.7 m length of the string, t = l ⁡ υ = 0 . 7 3 5 0 = 2 × 1 0 - 3 s

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