A student jumped on a trampoline. In the picture above, she has stretched the trampoline as much as it will stretch on this jump. Her body (her center of mass) has moved as low as it will go. A graph of the height of her body as a function of time would show only curved lines (no sharp corners and no straight line segments). Which of the following correctly describes the acceleration of the student when the center of mass of the student is at its lowest point (at the instant shown in the picture above)? Her acceleration points up. O Her acceleration is between zero and 9.8 meters per second squared, pointing down. Her acceleration is zero. O Her acceleration is greater than 9.8 meters per second squared, pointing down. O Her acceleration is 9.8 meters per second squared, pointing down.
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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