7(c). The motion of a particle on S.H.M. is given by
. If it has speed u when the displacement is
, and a speed v when the displacement is
, show that the amplitude of the motion is a
.



![Rendered by QuickLaTeX.com \frac[v^2y^2_1-u^2y^2_2{v^2-u^2}]^1/2](https://eduhilfe.com/wp-content/ql-cache/quicklatex.com-fbc1531734ff21c01aaca4d8fb220ee9_l3.png)
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