KinematicsHard
Question
A boat which has a speed of 5km per hour in still water a river of width 1 km along the shortest possible path in fifteen minutes. The velocity if the river water in km hour is : -
Options
A.1
B.2
C.3
D.
Solution
s = ut
1 = vBR cos θ t
1 = 5 cos θ
cos θ =
⇒ θ = 37ovR = vBR sin 37o = 5 ×
= 3 km/hrCreate a free account to view solution
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