Question

The rain falling vertically with velocity of 4 m/s and a boy moving towards east with speed of 3 m/s. then at what direction should he hold the umbrella to protect himself from rain?

Answer 1

Answer:

Let V

r

be the velocity of the rain .V

m

is the velocity of the man.

V=V

r

+V

m

=−3

k

^

−4

j

^

⇒tanβ=

3

4

⇒β=53

o

north of vertical.

Thus the man should hold the umbrella to protect himself from rains at 53

o

Explanation:

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