21. An astronaut on the Moon throws a baseball upward with an initial velocity of 10 meters per second, releasing the baseball 2 meters above the ground. The height of the baseball (in meters) is modeled by the function: h(t) = -0.81t2 + 10t + 2. The same experiment done on Earth is modeled by = -4.9t2 + 10t + 2, where h is in meters. How much longer would the ball stay in the air on the h(t) : Moon compared to on Earth?
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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