Pls tell how ans is vertical towards east? I've underlined the doubt part...
Pls tell how ans is vertical towards east? I've underlined the doubt part... 4,
Example 4.1 Rain is falling vertically With
a speed of 35 m Winds starts
after sometime with a speed of 12 m s in
east to west direction. In which directlon
should a boy waiting at a bus stop hold
his umbrella ?
Answer "Ihe velocity of the rain and the wind
ire represented by the vectors vr and v. in Fig.
17 and are in the direction specified by the
)roblem. Using the rule of vector addition, we
see that the resultant of v and v is R as shown
n the figure. The magnitude of R iS
35 +12 ms- -37 ms
the direction 0 that R makes with the vertical
iS given by
tan = 0343
nierefore. the boy should hold his umbrella
in the vertical plane at an angle of about J W'
With the vertical towards the east.