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Author Topic: c4 vectors quick question  (Read 675 times)

Offline zabady

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c4 vectors quick question
« on: May 02, 2010, 06:46:44 pm »
i want part C
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Offline astarmathsandphysics

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Re: c4 vectors quick question
« Reply #1 on: May 02, 2010, 07:34:00 pm »
When i get home. On a phone now.
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Offline T.Q

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Re: c4 vectors quick question
« Reply #2 on: May 02, 2010, 08:43:54 pm »
for part c


distance PQ=\sqrt{90}


R= (1+3s)i + (4+s)j+(2)k

so

distance  PR=\sqrt{10s^2 }

PQ=PR

\sqrt{90}=\sqrt{10s^2 }

Squer  both sides

90=10s^2

s=\pm3

now substitute S in L2

and find the coordinates 
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