Question

raindrops falling with actual velocity of 5m/s on a windy day appeared to fall vertically down on a man moving eastwards with a speed of 3ms-¹ the man reversed his direction in the same speed thr rain drops will fall on him with a speed of​
A) √52m/s
B) √79m/s
C) √87m/s
D) √63m/s

Answer 1

Explanation:

At first we have to find out the value of θ

so tanθ=

2

1

=0.5

θ=tan

−1

0.5=26.56

so here

velocity of rain w.r.t.man

V

rm

=10×cos26.56=8.94

velocity of man w.r.t groung

V

mg

=5×sin26.56=2.2.3

so V

rg

=V

rm

+V

mg

=5

5