A swimmer heading directly across a river 200 m wide reaches the opposite bank in 3 min 20 s. She is swept downstream 480 m. What is the speed of the current?
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A swimmer heading directly across a river 200 m wide reaches the opposite bank in 3 min 20 s. She is swept downstream 480 m. What is the speed of the current?
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- A ferry boat has a still water speed of 9.8 km/hrs. Its helmsman steers the boat due north across a river that runs with a current of 5.4 km/hr east. If the trip lasts 2.5 hrs, how wide is the rive.In the 2016 Olympics in Rio, after the 50 m freestyle competition, a problem with the pool was found. In lane 1 there was a gentle 1.2 cm/s current flowing in the direction that the swimmers were going, while in lane 8 there was a current of the same speed but directed opposite to the swimmers’ direction. Suppose a swimmer could swim the 50 m in 25.0 s in the absence of any current. How would the time it took the swimmer to swim 50.0 mm change in lane 1?A man swims across a river flowing south at a rate of 0.5 m/s. The keeps swimming perpendicularly to the river at a rate of 0.5 m/s heading east. What is the resultant velocity of the man?
- Suppose someone finds herself with her rowboat on the bank of a river that is 3 km wide. Her campsite is on the other side of the river, 8 km down the river bank from her starting point. First, she will row her boat across the river, then walk along the river bank to her campsite. She can row 3 kph in the river, and walk along the river bank at 5 kph. We can assume that the current in the river is negligible. Toward what point, in miles, on the other side of the river should she row in order to reach her campsite in the least time? Note: Omit units of measurement from your answer. Round to the nearest thousandth. Solution:A pilot wishes to fly his plane to an airport north of his current location.The plane has a speed of 290m/s. 1)If he is confronted by a wind blowing east of 50m/s,in what direction will he need to head in order to reach the desired destination? 2)How long will it take him to reach the airport if it is 800km away?A plane headed due south is traveling with an airspeed of 200 miles per hour. The wind currents are moving with constant speed in the direction 330°. If the ground speed of the plane is 100 miles per hour, what is its true course?