Physics Dynamics
posted by Anonymous
Swimming at 2.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 35 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current in the river? (b) At what angle relative to the line perpendicular to the shore should he head to arrive at a point directly opposite his starting point?

Henry
Tan A = 35/80 = 0.4375
A = 23.6o
a. Tan23.6 = Vc/2
Vc = 2*Tan23.6 = 0.874 m/s = Velocity of
the current.
b. Direction = 23.6o to the left.
Respond to this Question
Similar Questions

Physics
A swimmer heads directly across a river, swimming at 1.10 m/s relative to the water. She arrives at a point 60.0 m downstream from the point directly across the river, 80.0 m wide. What is the speed of the river current? 
physics
A swimmer heads directly across a river, swimming at 1.10 m/s relative to the water. She arrives at a point 52.0 m downstream from the point directly across the river, 72.0 m wide. What is the speed of the river current? 
physics
A swimmer heads directly across a river, swimming at 1.72 m/s relative to the water. She arrives at a point 39.0 m downstream from the point directly across the river, which is 72.7 m wide. What is the speed of the river current? 
Physics
A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 50 m downstream from the point directly across the river, which is 79 m wide. (a) What is the speed of the river current? 
physics
A swimmer heads directly across a river, swimming at 1.5 m/s relative to the water. She arrives at a point 30 m downstream from the point directly across the river, which is 87 m wide. 
physics
A swimmer heads directly across a river, swimming at 1.5 m/s relative to the water. She arrives at a point 30 m downstream from the point directly across the river, which is 87 m wide. (c) In what direction should the swimmer head … 
physics
A swimmer heads directly across a river, swimming at 1.2 m/s relative to the water. She arrives at a point 48 m downstream from the point directly across the river, which is 77 m wide. (a) What is the speed of the river current? 
physics
A swimmer, capable of swimming at a speed of 1.81 m/s in still water (i.e., the swimmer can swim with a speed of 1.81 m/s relative to the water), starts to swim directly across a 2.29kmwide river. However, the current is 1.31 m/s, … 
physics
A swimmer, capable of swimming at a speed of 1.18 m/s in still water (i.e., the swimmer can swim with a speed of 1.18 m/s relative to the water), starts to swim directly across a 2.16kmwide river. However, the current is 1.19 m/s, … 
Physics
Swimming at 3.00 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 50 m downstream from the point directly across the river from his starting point. (a) What is the speed of the current …