4. Bob tosses a pen straight up into the air, but does not catch it, so it falls to the floor. The speed of the pen is 3.7 m/s when it leaves his hands, and his hands are 1.2 m above the floor. a) What is the sign of the pen's velocity on the way up? What about the sign of its acceleration on the way up? b) How long was the pen in the air? ...at the top? ...at the top? way down? ...on the ...on the way 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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