Q. 185.0( 1 Vote )

A swimmer crosses

Answer :

Velocity of river = 5 ms–1

Width of river = 60 m



Let the flow of river be along x-axis


Then, given that the swimmer crossed at an angle 45° time taken by the swimmer is 6 s.


Now,


Now, displacement is given by:



Also, the time taken is 6 s


So, the velocity with respect to a stationary observer



Now, the river has the velocity in x-direction =


So, the relative velocity of a swimmer with respect to the river




Now, the magnitude of the velocity =


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