A passenger elevator is moving downward in a multistory building at a constant speed of 6.30 m/s. Exactly 1.97 s after the top of the elevator car passes a bolt loosely attached to the wall of the elevator shaft, the bolt falls from rest. a) At what time (in s) does the bolt hit the top of the still-descending elevator? (Assume the bolt is dropped at t = 0 s.) ____ s b) Estimate the number of floors through which the bolt can fall if the elevator reaches the ground floor before the bolt hits the top of the elevator. (Assume 1 floor = 3 m.) ______ floors
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 passenger elevator is moving downward in a multistory building at a constant speed of 6.30 m/s. Exactly 1.97 s after the top of the elevator car passes a bolt loosely attached to the wall of the elevator shaft, the bolt falls from rest.
a) At what time (in s) does the bolt hit the top of the still-descending elevator? (Assume the bolt is dropped at t = 0 s.)
____ s
b) Estimate the number of floors through which the bolt can fall if the elevator reaches the ground floor before the bolt hits the top of the elevator. (Assume 1 floor = 3 m.)
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