A spelunker is surveying a cave. She follows a passage 180 mm straight west, then 290 mm in a direction 45∘∘ east of south, and then 280 mm at 30∘∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started. Determine the direction of the fourth displacement. (?)
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 spelunker is surveying a cave. She follows a passage 180 mm straight west, then 290 mm in a direction 45∘∘ east of south, and then 280 mm at 30∘∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started.
Determine the direction of the fourth displacement. (?)
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