football is thrown by a quarterback (from shoulder level) to a receiver downfield, who catches it at shoulder level. At what point is the ball's speed at a minimum? (assume air resistance to be negligible). A. (a) just after leaving the quarterback's hand. B. (b) just before arriving at the receiver's hand. C. (c) at the top of the trajectory. D. (d) the speed is constant throughout the entire trajectory.
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 football is thrown by a quarterback (from shoulder level) to a receiver downfield, who catches it at shoulder level. At what point is the ball's speed at a minimum? (assume air resistance to be negligible).
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