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Physics / Conceptual Physics 12 / Chapter 5 / Problem 6P

Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt

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You are paddling a canoe at a speed of 4 km/h directly

Chapter 4, Problem 6P

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QUESTION:

You are paddling a canoe at a speed of 4 km/h directly across a river that flows at 3 km/h, as shown in the figure. (a) What is your resultant speed relative to the shore? (b) In approximately what direction should you paddle the canoe so that it reaches a destination directly across the river?

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QUESTION:

You are paddling a canoe at a speed of 4 km/h directly across a river that flows at 3 km/h, as shown in the figure. (a) What is your resultant speed relative to the shore? (b) In approximately what direction should you paddle the canoe so that it reaches a destination directly across the river?

ANSWER:

Solution 6P Introduction We have to calculate the resultant velocity in the first part of the problem. In the second part we have to calculate the angle, for which the resultant velocity will bo horizontal. Solution Part 1 (a) The resultant speed relative to the sour will be the magnitude of the resultant velocity of the canoe. The magnitude of the resultant velocity is given by vr= v1 + 22 + 1 2 cos Here we have v1= 4 km/h, v2= 3

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