1.

The velocity of a particle executing a simple harmonic motion is 13ms^(-1)when its distance from the equilibrium position (Q) is 3 m and its velocity is 12 ms^(-1)when it is 5 m away from Q. The frequency of the simple harmonic motion is

Answer»

`(5pi)/8`
`5/(8pi)`
`(8pi)/5`
`8/(5pi)`

Solution :For a particle is executing simple harmonic motion,
the VELOCITY, `v = omegasqrt(A^(2)-x^(2))`
When the velocity at 3 m is 13 `ms^(-1)`, then
`13^(2) = OMEGA^(2)(A^(2)-3^(2))`……(i)
When the velocity at 5m is `12 ms^(-1)`, then
`12^(2) = omega^(2) (A^(2)-5^(2))`........(ii)
From eqns. (i) and (ii), `omega =5/4 rad s^(-1)`
`u =N/(2L) = 5/(8pi)`


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