Answer to Question #182497 in Physics for Michael Teshome

Question #182497

suppose A=3i-2j and B=-j-aj ,what is the value of a such that A+B=2i

Expert's answer

Add each component of the vectors respectively:

"A+B=2i,\\\\\\space\\\\\n(3i-2j)+(-i-aj)=2i,\\\\\ni-j(2+a)=2i."

The last is only possible when

"2+a=0, \\\\\na=-2."

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