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Man standing on a road has to hold his umbrella at 30° with the vertical to keep the rain away. He throws the umbrella and starts running at 10 km per hour. He finds that raindrops are Hitting is head vertically. Find the speed of raindrops with respect to (a) the road, (b) the moving man.
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Answered by
0
Answer:
Velocity of the man v
m
running with is 10
i
^
when man run he found that rain falling verticaly hitting his head
Let velocity of rain with respact to man v
r/m
=−v
j
^
velocity of rain v
r
=v
r/m
+v
m
=−v
j
^
kmph+10
i
^
kmph
tan30
0
=
v
10
⇒v=10
3
kmph
we gat v
r
=10
i
^
−10
3
j
^
magnitude we v=
10
2
+(10
3
)
2
=20kmph
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