Physics - SHM Question with Solution | TestHub

Here,$T=20 \mathrm{s}$

Also, when$t=2 \mathrm{s}, v=5 \mathrm{cm} {\mathrm{s}}^{-1}$

$\mathrm{Now,} \mathit{v}=A\mathit{\omega }cos\; \omega t=\mathit{\text{A}}\times \frac{2\text{π}}{\mathit{\text{T}}}\text{cos}\frac{2\text{π}}{\mathit{\text{T}}}\mathit{\text{t}}$

$\therefore 5=\text{A}\times \frac{2\text{π}}{20}\text{cos}\frac{2\text{π}}{20}\times 2\text{or}\frac{\text{A}\text{π}}{10}\text{cos}\frac{\text{π}}{5}=5$

$\mathrm{or }\frac{\text{π}\mathit{\text{A}}}{10}\text{cos }\text{36°}=5\text{or}\frac{\text{π}\mathit{\text{A}}}{10}\times 0\text{.}8090=5$

or$A=19.67 \mathrm{cm}$