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WRONG ANSWERS WILL BE REPORTED!!! |
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Answer» Answer: 1 sec Explanation: v = 2t -4 i + 2t j a = 2i + 2j For a PERPENDICULAR to v, a(vector).v(vector) = 0 (as angle = 90) 4T -8 + 4t = 0 t = 1 sec |
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