"s=2sin(3t)i+2cos(3t)j+8tk.\\\\\nv=\\frac{ds}{dt}=6cos(3t)i-6sin(3t)j+8k.\\\\\na=\\frac{dv}{dt}=-18sin(3t)i-18cos(3t)j+0k.\\\\\n|a|=\\sqrt{324sin^2(3t)+324cos^2(3t)}=\\sqrt{324}=18."
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