A girl lays on the edge of a cliff and looks down at the water below. Wondering how far the drop is, she drops a pebble over the edge and counts 2.75 s from the time that she releases the pebble (from rest) to when it strikes the water. How far below the cliff is the surface of the water? (Use g = 9.80 m/s2 as the acceleration of gravity.)
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.
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