Student Questions 9-2-14
Would it be easier to just think of numbers that make the dot products 0
instead of doing cross product?
In my opinion that is a strong no. Cross product is way faster.
Can you go over forces with vectors?
Since lecture moves way faster than recitation we might need to spend our time catching
up on the really important things rather than going back to something like this.
However, I am always availible in office hours.
If ~v = au~1 + bu~2 and u~1 · u~2 = 0, find ~v · u~1 .
~v · u~1 = (au~1 + bu~2 ) · u~1 = au~1 · u~1 + bu~2 · u~1 = a(u~1 · u~1 ) + b(u~2 · u~1 ) = a(u~1 · u~1 ) = a||u~1 ||.
When is our first test?
Monday September, 21st. It is on Dr. Wilson’s webpage.
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