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  • Rain is falling vertically downward with a speed of 4 km/h. A girl moves on a straight road with a

Rain is falling vertically downward with a speed of 4 km/h. A girl moves on a straight road with a velocity of 3km/h. The apparent speed (in m/s) of rain with respect to the girl is:

Option: 1

5


Option: 2

4


Option: 3

3


Option: 4

7


Answers (1)

best_answer

 

 

\underset{V_{R/G}}{\rightarrow}  = \underset{V_{R}}{\rightarrow}  -  \underset{V_{G}}{\rightarrow}         

VR = Velocity of rain wrt ground     VG=Velocity of girl wrt ground

\left | \underset{V_{R/G}}{\rightarrow}\right |   =  \sqrt{V_{R}^{2}+V_{G}^{2}}=\sqrt{3^{2}+4^{2}}=5\: km/h

 

Posted by

Pankaj Sanodiya

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