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Grade: 12th pass
        
please answer question no. B5 IN DETAIL WITH VECTTOR CONCEPT THANKS
one month ago

Answers : (1)

Arun
16186 Points
							
Dear student
 
 

vel. of boat w.r.t wind Vbw = -2j

vel. of boat w.r.t water current Vbc = -4i

given vel. of boat w.r.t earth(water current + wind): Vb(w+c) = 6i + 8j

so, V- Vw = -2j                   .............(1)

       V- Vc = -4i                   .............(2)

       V- V(w+c) = 6i + 8j     . ............(3)

Let vel. of boat alone due to its power is = (ai+bj)

From above (1) + (2) -(3) gives

Vb = -10.(i + j)

The magintude of vel. of boat = 14.14 kmph

direction is 45 degrees south west

 

Regards

Arun

one month ago
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