2. A 60 kg skateboarder comes over the top of a hill at 5.0 m/s, and then skates down an increasingly steep grade to a point halfway above the bottom of the hill, before rolling out on a much gentler slope near the bottom. The boarder's speed at the bottom of the hill is 10 m/s. (Ignore friction for this problem.) (a) Is the acceleration of the boarder down the hill constant? Explain why or why not. (b) Find the net work done on the skateboarder between the top and bottom of the hill.
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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