- #36
Delta2
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yes and what will be the adjacent?
Yes ok you can use pythagorean theorem, but you could do it as 25*cos(25)uniquegirl said:Sin A= √(c^2-b^2)
SinA= √(25^2-10^2)
Sin= 22.91
No Ve is the opposite site , Vn is the adjacent side, the answer for Ve you calculated it as 10.24.uniquegirl said:oh ok thank you! so 22.91 is the right answer? So the answer for Ve is the same as the answer for Vn, because they are same triangles?
this would have been correct if you had used as vi=25sin(25)=10.24.uniquegirl said:Assuming Ve is 22.91,for question b this is what I did, feel free to correct me
Question b- A strong gust of wind from the west causes the skier to accelerate to the east at 2.0 m s-2 for 1.8 s. Calculate the new velocity in the easterly direction
vi=22.65ms-1 t= 1.8s a=2.0ms^2 vf=?
vf=vi+at
vf= 22.65+2.0x1.8
vf= 26.25
uniquegirl said:tan-1=opp/hyp
The 22.91 is inaccurate. That is because in post #37 you used ve=10 instead of 10.56. (Or, better, using vn=25cos(25).)uniquegirl said:For the size, I used v=(square root ) a^2+b^2
v= (square root)22.91^2+10.56^2
would this be right?