rain is appearing to fall at an angle of 45 degree with vertical to the man walking at a speed of 1 m/s in horizantal direction. If man increased his speed to 3 m/s than rain appear to him falling at an angle of 37 degree with vertical.what is the actual speed of rain with which it fall?
Answers
Explanation:
From (1) & (2) angle between V
r
& 3km/hr
figure (1) is 45
0
.
∴ From figure (1)
V
r
cos45=3km/hr
⇒V
r
=3
2
km/hr
tanθ=
V
r
3
=
3
2
3
⇒θ=tan
−1
(
2
1
).
solution
December 27, 2019
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