Question
Two force vectors act on an object and the dot product of the two vectors is 20. If both of the force vectors are doubled in magnitude, what is their new dot product?
Answers
a•b = |a|*|b|*cosθ
if you replace |a| with 2|a| and the same for b, what do you get?
if you replace |a| with 2|a| and the same for b, what do you get?
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