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A uniform string of length 20 {~m} is suspended from a rigid s

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Solving time: 3 mins

A uniform string of length $20 m$ is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take, $g = 10 ms^{- 2}$ )
(a) $2 π 2 s$
(b) $2 s$
(c) $22 s$
(d) $2 s$

Views: 6,304 students

Updated on: Oct 16, 2023

Book:

Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2016

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Jack Discussed

A uniform string of length

20 m

is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take,

g = 10 ms^{- 2}

)
(a)

2 π 2 s

(b)

2 s

(c)

22 s

(d)

2 s

10 mins ago

Discuss this question LIVE

10 mins ago

Text solutionVerified

Exp. (c)
A uniform string of length

20 m

is suspended from a rigid support. Such that the time taken to reach the support,

T = \frac{m gx}{l}

So, velocity at point

P = \frac{m gx}{\frac{l}{m / l}}

i.e.

v = gx

\frac{d x}{d t} = gx

\Rightarrow \int_{0}^{20} \frac{d x}{x} = \int_{0}^{t} g d t

[2 x]_{0}^{20} = 10 t \Rightarrow 220 = 10 t

t = 22 s

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Question Text	A uniform string of length $20 m$ is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take, $g = 10 ms^{- 2}$ ) (a) $2 π 2 s$ (b) $2 s$ (c) $22 s$ (d) $2 s$
Updated On	Oct 16, 2023
Topic	Waves
Subject	Physics
Class	Class 11
Answer Type	Text solution:1 Video solution: 16
Upvotes	1724
Avg. Video Duration	5 min

A uniform string of length $20 m$ is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take, $g = 10 ms^{- 2}$ )
(a) $2 π 2 s$
(b) $2 s$
(c) $22 s$
(d) $2 s$

Text solutionVerified

Filo tutor solutions (16)

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Practice questions from Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

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A uniform string of length 20 m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take, g=10 ms−2 )(a) 2π2​ s(b) 2 s(c) 22​ s(d) 2​ s

Text solutionVerified

Filo tutor solutions (16)

Questions from JEE Mains 2016 - PYQs

Practice questions from Arihant Physics JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Practice questions from Waves in the same exam

Practice more questions from Waves

Practice questions on similar concepts asked by Filo students

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Previous year question papers

A uniform string of length $20 m$ is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is (Take, $g = 10 ms^{- 2}$ )
(a) $2 π 2 s$
(b) $2 s$
(c) $22 s$
(d) $2 s$