Need the answer for the 21 st question Please Quick !!!!!!
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Explanation:
She should hold the umbrella a little inclined towards the west from the vertical.
The drops which are falling a little ahead of the current position of the woman, will fall on her, because she moves in that direction.
relative velocity of the rain drops wrt cyclist = velocity of woman - velocity of rain
the magnitude of relative velocity the rain drops wrt woman =
(12
2
+35
2
)
=37m/s
direction . relative velocity of the rain drops = tan
−1
(12/35)=18.92deg from the vertical.
So the cyclist should hold the umbrella at 18.92deg to the vertical in the forward direction.
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