Concept explainers
(a)
The change in velocity during the trip.
(a)
Answer to Problem 50P
The change in velocity during the trip is
Explanation of Solution
Consider the figure 1 showing initial and final velocities
Let
Write the expression for change in velocity
Here,
Write the expression for magnitude of change in velocity
Write the expression for direction of change in velocity
Conclusion:
Substitute
If west changes to east, equation (IV) become
The
Substitute equation (VI) and (VII) in (II)
Substitute equation (VI) and (VII) in (III)
Therefore, the change in velocity during the trip is
(b)
The average acceleration during the trip.
(b)
Answer to Problem 50P
The average acceleration during the trip
Explanation of Solution
Write the expression of change in time for the three distances
Here,
Write expression for average velocity
Here
Conclusion:
Substitute
Substitute
Therefore, the average acceleration during the trip
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