Multiple-Concept Example 9 reviews the concepts that are important in this problem. A drag racer, starting from rest, speeds up for 438 m with an acceleration of +24.1 m/s². A parachute then opens, slowing the car down with an acceleration of -8.78 m/s². How fast is the racer moving 273 m after the parachute opens?
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.
![**Problem Statement:**
**Multiple-Concept Example 9** reviews the concepts that are important in this problem. A drag racer, starting from rest, speeds up for 438 m with an acceleration of +24.1 m/s². A parachute then opens, slowing the car down with an acceleration of -8.78 m/s². How fast is the racer moving 273 m after the parachute opens?
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