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Question

Tension in the rope is
60 N
100 N
120 N
240 N

A

100 N

B

120 N

C

60 N

D

240 N

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Solution

Verified by Toppr

$μ = \frac{1.2}{2} = 0.6 k g / m$
$f = 5 H z, λ = 2 l = 4 m$
$v = n λ = 5 \times 4 = 20 m / s$
Using: $v = \sqrt{\frac{T}{m u}} \Rightarrow T = 20^{2} \times 0.6 = 240 N$

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