Question

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Answer 1

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answer is here in the attachment

Answer 2

Givent

the body is in simple harmonic motion

he body is in simple harmonic motion a = -bx

x = -a/b

x/a = 1/b

Now we know that time period = 2πf

time period sqrt(displacement /acceleration)

Now on putting the value

time period = 2π sqrt (1/b)