Concept explainers
For Questions 18—19, recall that when two vectors in the same or exactly opposite directions are added, the magnitude of their resultant is the sum or difference of their original magnitudes.
Calculate the resultant velocity of an air-plane that normally flies at 200 km/h if it encounters a 50-km/h tailwind. If it encounters a 50-km/h headwind.
Resultant velocity of airplane.
Answer to Problem 18A
Resultant velocity is 250 km/h when encounters tailwind and 150 km/h when encounters headwind.
Explanation of Solution
Given :
Velocity of airplane,
Formula used :
According to concept of relative velocity.
Where,
Where,
Calculation :
Substituting the value of
Now, substituting the value of
Conclusion :
Therefore, resultant velocity of airplane when it encounters tailwind is 250 km/h and 150 km/h when it counters headwind
Chapter 5 Solutions
Conceptual Physics: The High School Physics Program
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