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Problem 12-11: Engineering Mechanics- Dynamics (Hibbeler 14th Edition)

Engineering Mechanics Dynamics · R.C. Hibbeler · Chapter 12

Course: Engineering Mechanics Dynamics Book: R.C. Hibbeler Chapter: Chapter 12

Question

Average Velocity and Average Speed in Rectilinear Kinematics

This lesson covers rectilinear (straight-line) kinematics for a particle that changes direction during its motion. Students learn to distinguish displacement from total path length and apply those concepts to compute average velocity (a vector) and average speed (a scalar) over a given time interval.

Question:
A particle travels along a straight-line path such that in 4 seconds it moves from an initial position s-A equal to negative 8 meters to a position s-B equal to positive 3 meters. Then in another 5 seconds it moves from s-B to s-C equal to negative 6 meters. Determine the particle's average velocity and average speed during the 9-second time interval.

In this lesson, you will learn to:
• Calculate displacement as the net change in position between two points in time
• Compute average velocity using total displacement d

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