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OpenStudy (adunb8):
OpenStudy (adunb8):
i dont understand please!! step by step if possible =(
OpenStudy (adunb8):
problem 2.89
random231 (random231):
okay do u know how to resolve a vector into its components?
OpenStudy (adunb8):
do you mean to i j k?
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random231 (random231):
um thats when the force is in vector form. i mean to say Fcos(theta) and Fsin(theta)
OpenStudy (adunb8):
i know how to do that but how do you find the theta then? and for F is it 385N?
random231 (random231):
u have to find sin(theta) and cos(theta). Draw an imaginary triangle taking the rope as hypoteneuse. then sin(theta)=height/hypoteneuse and co(theta)=base/hypoteneuse.
OpenStudy (adunb8):
let me see what i get.
OpenStudy (adunb8):
i got 350Nsin (theta) = Fy and 350Ncos(theta) = Fx
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random231 (random231):
why 350? it shudda been 385
OpenStudy (adunb8):
oops i mean 385
OpenStudy (adunb8):
what do i do after that?
random231 (random231):
okay now construct an imaginary triangle using points ABD
OpenStudy (adunb8):
then what do i do?
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random231 (random231):
find value sin(theta)=AD/DB and cos(theta)=AB/DB
random231 (random231):
multiply each with 385 and ull hav the two components of force
OpenStudy (adunb8):
let me see what i get and let you know.
random231 (random231):
ok
OpenStudy (adunb8):
im getting undefined.. ?? i did sin(theta) = 510/385
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OpenStudy (adunb8):
then inverse to find the angle?
random231 (random231):
nono not 510
random231 (random231):
its rather a long calculation
OpenStudy (adunb8):
what?? how can you show me?
random231 (random231):
find the measure of the sides of triangle properly
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OpenStudy (adunb8):
um i dont understanding ... sorry.. ?
random231 (random231):
i made some changes just open it?
random231 (random231):
random231 (random231):
this one open it
random231 (random231):
@adunb8
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OpenStudy (adunb8):
yes i see it
OpenStudy (adunb8):
would it be sin (theta) = 320mm/510mm ?
OpenStudy (adunb8):
sin (theta) 320/385?
OpenStudy (adunb8):
im so confused....
random231 (random231):
AD = 602 mm
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random231 (random231):
tell me @adunb8 are u permitted to use a calculator?