8) An object moved 200 m E, 50 m 30° N of W , then 20 m 45 ^ 0 of W. Find the final displacement
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Expert's answer
2021-05-10T16:04:21-0400
"s=(200,0)+(-50\\cos{30},50\\sin{30})\\\\+(-20\\cos{45},20\\sin{45})=(142.6,39.1)\\ m\\\\s=\\sqrt{142.6^2+39.1^2}=148\\ m\\\\\n\\theta=\\arctan{\\frac{39.1}{142.6}}=15\\degree \\text{ N of E}"
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