2.9 •. A ball moves in a straight line (the x-axis). The graph in Fig. E2.9 shows this ball's velocity as a function of time. (a) What are the ball's average speed and average velocity during the first 3.0 s? (b) Suppose that the ball moved in such a way that the graph seg- ment after 2.0 s was – 3.0 m/s instead of +3.0 m/s. Find the ball's average speed and average velocity in this case. Figure E2.9 v, (m/s) 3.0 2.0 1.0 o| t (s) 3.0 1.0 2.0
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
![2.9 .• A ball moves in a straight line (the x-axis). The graph in
Fig. E2.9 shows this ball's velocity as a function of time. (a) What are
the ball's average speed and average velocity during the first 3.0 s?
(b) Suppose that the ball moved in such a way that the graph seg-
ment after 2.0 s was – 3.0 m/s instead of +3.0 m/s. Find the ball's
average speed and average velocity in this case.
Figure E2.9
U, (m/s)
3.0
2.0
1.0
t (s)
3.0
1.0
2.0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F43388770-367d-4862-ba81-4a35f542f382%2F1064db38-3ab0-42ec-be79-9af3a3b9e49d%2Fesp6sk_processed.jpeg&w=3840&q=75)
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