2 tricky questions of mechanics :D

[1992]

Can someone explain Q3 and Q4 from O/N 2009: 41
With explanation needed please The marck scheme says that theres many way to solve them, but i dont understand any :S

 

[princesszahra]

Q3 ull have to solve using sine rule
otherwise ull get negitive answers
redraw the drawing in resultant from and ull get it
and Q4 i find it ok
in the forst part u need not consider the weight of S nor the friction

 

[1992]

ok thanks i did Q3 with sin rule.
But i still dont know how to do Q4. The first part especially, beacause if i dont do the first part, i wont be able to do the second part,
could you put the steps to calculate the tension please

 

[princesszahra]

u find the angle first
use cos rule
and then u resolve the forces
i am sure ull get it
yar u know its not difficult to type my answer but i want u to do it on ur own!

 

[1992]

ur like my teacher haha
well ill try

 

[princesszahra]

hahaaa
me and teacher????
this can never happen!
if i ever become a teacher i'lll be teaching
how to laught
how to make broken ppl smile like a crazy person and
how to cry when u want to!
thats all i can teach!