Question

relative motion in 2d: problem solving
labeling vectors
a plane is heading in a direction north 5 degrees east at 100 km/h and a wind is blowing in a direction east 2 degrees north at 20km/h.
vpa =?
a. velocity of the air relative to the ground
b. velocity of the air relative to the plane
c. velocity of the plane relative to the ground
d. velocity of the plane relative to the air
e. velocity of the person relative to the air

Explanation:

In relative - motion notation, the first sub - script refers to the object in question and the second to the reference frame. So, VPA represents the velocity of the plane relative to the air.

Answer:

D. Velocity of the plane relative to the air