fisica1-youn-e-freedman-exercicios-resolvidos

−1 200−20
o
1.73: a) Angle of first line is ( ) = 42 .
θ = tan
210−10
Angle of
o o o
second line is 42 + 30 = 72 . Therefore
o
X = 10 + 250 cos 72 = 87
o
Y = 20 + 250 sin 72 = 258
for a final point of (87,258).
b) The computer screen now looks something like this:
The length of the bottom line is ( 210 87) + ( 200 − 258) = 136
−1
258−200
o
( ) = 25 below straight left.
tan
210−87
2
2
− and its direction is