A river 98.6 m wide flows toward the south at 37.8 m/min, A girl on the west bank wishes to reach the east bank in the least possible time. She can swim 98.6 m in still water in 1.45 min.(a) How long does it take her to cross the river?(b) How far downstream does she travel?(c) What is her velocity relative to land?magnitudedirectionsouth of east:(d) What is the total distance she travels?(6) In what direction must she swim if she wishes to travel straight across the river?

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A river 98.6 m wide flows toward the south at 37.8 m/min, A girl on the west bank wishes to reach the east bank in the least possible time. She can swim 98.6 m in still water in 1.45 min. (a) How long does it take her to cross the river? (b) How far downstream does the travel? (c) What is her velocity relative to land? magnitude direction south of east (d) What is the total distance she travels (e) In what direction must she swim if she wishes to travel straight across the river?

A river 98.6 m wide flows toward the south at 37.8 m/min, A girl on the west bank wishes to reach the east bank in the least possible time. She can swim 98.6 m in still water in 1.45 min. (a) How long does it take her to cross the river? (b) How far downstream does the travel? (c) What is her velocity relative to land? magnitude direction south of east (d) What is the total distance she travels (e) In what direction must she swim if she wishes to travel straight across the river?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

A river 98.6 m wide flows toward the south at 37.8 m/min, A girl on the west bank wishes to reach the east bank in the least possible time. She can swim 98.6 m in still water in 1.45 min.
(a) How long does it take her to cross the river?
(b) How far downstream does she travel?
(c) What is her velocity relative to land?
magnitude
direction
south of east:
(d) What is the total distance she travels?
(6) In what direction must she swim if she wishes to travel straight across the river?

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