| help physics question relating simple harmonic motion?
acceleration of any shm can be described as = -a w^2 sin(wt)where a is amplitudew is the angular frequencyfor force between particle and platform to vanish at any point. g = a w^2 sin(wt)The minimum frequency at which this happens will be when sin(wt)=1g=a w^2so w = √(g/a) = √(9.8/.1) = 9.9
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