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A particle is moving in \( x-y \) plane. At certain instant of time, the components of its velocity and acceleration are as follows:
\( v_{\mathrm{x}}=3 \mathrm{~m} / \mathrm{s}, v_{\mathrm{y}}=4 \mathrm{~m} / \mathrm{s}, a_{\mathrm{x}}=2 \mathrm{~m} / \mathrm{s}^{2} \) and \( a_{\mathrm{y}}=1 \mathrm{~m} / \mathrm{s}^{2} \). Find the rate of change of speed \( \left(\right. \) in \( \mathrm{m} / \mathrm{s}^{2} \) ) at this moment.
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