A river flowing southward has a current of 7 miles per hour. A motorboat in still water maintains a speed of 17 miles per hour. The motorboat starts at the west shore on a bearing of N40°E. What is the actual speed and direction of the boat?

A river flowing southward has a current of 7 miles per hour. A motorboat in still water maintains a speed of 17 miles per hour. The motorboat starts at the west shore on a bearing of N40°E. What is the actual speed and direction of the boat?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section5.1: Vectors

Problem 3PP

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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.

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