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**[SOLVED] Undamped, Forced Oscillation**

## Homework Statement

Damping is negligible for a 0.133 kg mass hanging from a light 6.80 N/m spring. The system is driven by a force oscillating with an amplitude of 1.34 N. At what frequency will the force make the mass vibrate with an amplitude of 0.445 m? There are two possible solutions, enter one of them.

## Homework Equations

A=(F/m)/(sqrt(((w^2 - Wo^2)^2) + (bw/m)^2))

wo= sqrt(k/m)

## The Attempt at a Solution

i filled in the equation, solved for w and got 8.63 Hz, but its wrong. A point in the right direction would do wonders.

Cheers

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