
Concept explainers
Total displacement of the car.

Answer to Problem 55A
Total displacement of the car is 79.05 km.
Explanation of Solution
Given:
Car moves first 65 km in the east direction and then 45 km in the west direction.
Formula Used:
The resultant of two vectors is given by,
R=√P2+Q2
Here, P and Q are two vectors which are perpendicular to each other.
Calculation:
It is given first car displacement is 65 m due east.
Let P=65 km
And then 45 m due west.
Let Q=45 km
East and west direction is perpendicular to each other. From the vector principle when two vectors are perpendicular to each other then their resultant magnitude is given by,
R=√P2+Q2=√652+452=√6250= 79.05 km
Conclusion:
Therefore, total displacement is 79.05 km.
Chapter 5 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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