a river flows at 3m/s and 300m wide.A man swims across the river with the velocity of 2m/s directed always perpendicular to the flow of current. how long will it take the man to cross the river? in what direction he actually move relative to the shore? how far down the stream does it reaches the opposite bank?
Answers
Answered by
56
Answer:
150 min
33.7°
450 m
Explanation:
a river flows at 3m/s and 300m wide.A man swims across the river with the velocity of 2m/s directed always perpendicular to the flow of current. how long will it take the man to cross the river? in what direction he actually move relative to the shore? how far down the stream does it reaches the opposite bank?
Man Velocity = 2 m/s
River Velocity = 3m/s
Net velocity = √2² + 3² = √13 m/s
Angle with stream = α
Tanα = 2/3 => α = Tan⁻¹(2/3) = 33.7°
Time taken by man to cross river = 300/2 = 150 min
he actually move 33.7° relative to the shore
down the stream he reaches the opposite bank = 150 * 3 = 450 m
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4
Answer:
how can I find the degree?
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