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Question

The velocities of a particle performing linear SHM are 0.13 m/s and 0.12 m/s when it is at 0.12m and 0.13 m from mean position respectively, the period is:

A
πs
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B
2πs
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C
3πs
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D
4πs
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Solution

The correct option is B 2πs
V=ωA2x2
V1=ωA2x21
V2=ωA2x22
0.130.12 = A2(0.12)2A2(0.13)2
0.1320.122 = A2(0.12)2A2(0.13)2
Cross-multiplying,
((0.13)2(0.12)2)A2=(0.13)4(0.12)4
A2=(0.13)2+(0.12)2
A=(0.13)2+(0.12)2
Using, x = ωA2x2
0.13=ω(0.13)2+(0.12)2(0.12)2
ω=1
T=2π/ω
T=2πsec

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