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.
Figure CQ2.6 shows strobe photographs taken of a disk moving
from left to right under different conditions. The time interval between images is constant. Taking the direction to
the right to be positive, describe the motion of the disk in
each case. For which case is (a) the acceleration positive? (b)
the acceleration negative? (c) the velocity constant?
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