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.
You stand on a top of a lighthouse while your friend is on the ground outside. You peered into the window and dropped the bulb used on the lighthouse and asked your friend to check if it is still okay. He caught the bulb with the ease after 2.49 seconds then tossed it back up to you and it lands directly into your hands. What is the velocity of the bulb at the exact moment your friend tossed it back up to you?
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