Question

If a tail of vector is printed down and rotated by 200⁰ it is equivalent to​

Answer 1

Answer:

Using parallelogram law:

∣

R

∣=

(l

2

+l

2

−2l

2

cosθ)

∣

R

∣=l

2(1−cosθ)

∣

R

∣=l

2(2sin

2

(

2

θ

))

∴∣

R

∣=2lsin(

2

θ

)

Answer 2

Answer:

Let the x-axis represent the east-west direction. Using a ruler and protractor, draw an arrow to represent the first vector (nine blocks to the east), as shown in Figure 5.3(a).