A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no appreciable air drag. (In other words, the brick is in free-fall.) (a) How tall, in meters, is the building? (b) How fast is the brick moving just before it hits the ground? (c) Sketch graphs of this falling brick’s acceleration, velocity, and vertical positions as functions of time.
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.
A brick is released with no initial speed from the roof of a building and
strikes the ground in 2.50 s, encountering no appreciable air drag. (In
other words, the brick is in free-fall.)
(a) How tall, in meters, is the building?
(b) How fast is the brick moving just before it hits the ground?
(c) Sketch graphs of this falling brick’s acceleration, velocity, and vertical
positions as functions of time.
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