Rosy and Joanna begin side-by-side at one end of the nursery. At the same moment, they begin to walk to the other end of the nursery, Rosy at 1.0 m/s, and Joanna at twice that constant speed. Sometime during her walk, Joanna stops to rest for 8.0 s, but then starts walking again at her original constant speed. When Rosy reaches the end of the nursery, Joanna is 3.0 m behind her. (a) How much time did it take Rosy to walk across the nursery? (b) How far did Rosy walk?
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.
Rosy and Joanna begin side-by-side at one end of the nursery. At the same moment, they begin to
walk to the other end of the nursery, Rosy at 1.0 m/s, and Joanna at twice that constant speed.
Sometime during her walk, Joanna stops to rest for 8.0 s, but then starts walking again at her original
constant speed. When Rosy reaches the end of the nursery, Joanna is 3.0 m behind her. (a) How much
time did it take Rosy to walk across the nursery? (b) How far did Rosy walk?
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